diff --git a/.settings/org.eclipse.core.resources.prefs b/.settings/org.eclipse.core.resources.prefs
new file mode 100644
index 0000000..164e526
--- /dev/null
+++ b/.settings/org.eclipse.core.resources.prefs
@@ -0,0 +1,2 @@
+eclipse.preferences.version=1
+encoding/build.sh=UTF-8
diff --git a/mdbxjni/src/main/java/com/castortech/mdbxjni/Cursor.java b/mdbxjni/src/main/java/com/castortech/mdbxjni/Cursor.java
index 7c5f4e0..04da18a 100644
--- a/mdbxjni/src/main/java/com/castortech/mdbxjni/Cursor.java
+++ b/mdbxjni/src/main/java/com/castortech/mdbxjni/Cursor.java
@@ -72,7 +72,7 @@ public void close() {
 	 *          transaction handle
 	 */
 	public void renew(Transaction tx) {
-		checkErrorCode(env, mdbx_cursor_renew(tx.pointer(), pointer()));
+		checkErrorCode(env, tx, mdbx_cursor_renew(tx.pointer(), pointer()));
 	}
 
 	/**
@@ -96,7 +96,7 @@ public Entry get(CursorOp op) {
 		if (rc == MDBX_NOTFOUND) {
 			return null;
 		}
-		checkErrorCode(env, rc);
+		checkErrorCode(env, tx, rc);
 		return new Entry(key.toByteArray(), value.toByteArray());
 	}
 
@@ -110,7 +110,7 @@ public Entry get(CursorOp op, byte[] key) {
 			if (rc == MDBX_NOTFOUND) {
 				return null;
 			}
-			checkErrorCode(env, rc);
+			checkErrorCode(env, tx, rc);
 			return new Entry(keyValue.toByteArray(), value.toByteArray());
 		}
 		finally {
@@ -131,7 +131,7 @@ public Entry get(CursorOp op, byte[] key, byte[] value) {
 			if (rc == MDBX_NOTFOUND) {
 				return null;
 			}
-			checkErrorCode(env, rc);
+			checkErrorCode(env, tx, rc);
 			return new Entry(keyValue.toByteArray(), valValue.toByteArray());
 		}
 		finally {
@@ -154,7 +154,7 @@ public OperationStatus get(CursorOp op, DatabaseEntry key, DatabaseEntry value)
 			if (rc == MDBX_NOTFOUND) {
 				return OperationStatus.NOTFOUND;
 			}
-			checkErrorCode(env, rc);
+			checkErrorCode(env, tx, rc);
 			key.setData(keyValue.toByteArray());
 			value.setData(valValue.toByteArray());
 			return OperationStatus.SUCCESS;
@@ -262,7 +262,7 @@ private byte[] put(Value keySlice, Value valueSlice, int flags) {
 		}
 		else {
 			// If the put failed, throw an exception..
-			checkErrorCode(env, rc);
+			checkErrorCode(env, tx, rc);
 
 			if (!valueSlices.isEmpty()) {
 				db.deleteSecondaries(tx, keySlice, valueSlices);
@@ -289,7 +289,7 @@ public void delete() {
 		}
 
 		int rc = mdbx_cursor_del(pointer(), 0);
-		checkErrorCode(env, rc);
+		checkErrorCode(env, tx, rc);
 
 		if (hasSec) {
 			for (SecondaryDatabase secDb : db.getSecondaries()) {
@@ -311,7 +311,7 @@ public void delete() {
 	 * May only be called if the database was opened with {@link com.castortech.mdbxjni.Constants#DUPSORT}.
 	 */
 	public void deleteIncludingDups() {
-		checkErrorCode(env, mdbx_cursor_del(pointer(), MDBX_NODUPDATA));
+		checkErrorCode(env, tx, mdbx_cursor_del(pointer(), MDBX_NODUPDATA));
 	}
 
 	/**
@@ -326,7 +326,7 @@ public void deleteIncludingDups() {
 	 */
 	public long count() {
 		long[] rc = new long[1];
-		checkErrorCode(env, mdbx_cursor_count(pointer(), rc));
+		checkErrorCode(env, tx, mdbx_cursor_count(pointer(), rc));
 		return rc[0];
 	}
 
diff --git a/mdbxjni/src/main/java/com/castortech/mdbxjni/EnvInfo.java b/mdbxjni/src/main/java/com/castortech/mdbxjni/EnvInfo.java
index 5f99806..c616d55 100644
--- a/mdbxjni/src/main/java/com/castortech/mdbxjni/EnvInfo.java
+++ b/mdbxjni/src/main/java/com/castortech/mdbxjni/EnvInfo.java
@@ -61,7 +61,8 @@ public class EnvInfo {
 
 		pgopStat =  new PgopStat(rc.mi_pgop_stat_newly, rc.mi_pgop_stat_cow, rc.mi_pgop_stat_clone,
 				rc.mi_pgop_stat_split, rc.mi_pgop_stat_merge, rc.mi_pgop_stat_spill, rc.mi_pgop_stat_unspill,
-				rc.mi_pgop_stat_wops);
+				rc.mi_pgop_stat_wops, rc.mi_pgop_stat_prefault, rc.mi_pgop_stat_mincore, rc.mi_pgop_stat_msync,
+				rc.mi_pgop_stat_fsync);
 	}
 
 	public Geo getGeo() {
@@ -338,9 +339,13 @@ public class PgopStat {
 		private final long spill;
 		private final long unspill;
 		private final long wops;
+		private final long prefault;
+		private final long mincore;
+		private final long msync;
+		private final long fsync;
 
 		public PgopStat(long newly, long cow, long clone, long split, long merge, long spill, long unspill,
-				long wops) {
+				long wops, long prefault, long mincore, long msync, long fsync) {
 			super();
 			this.newly = newly;
 			this.cow = cow;
@@ -350,6 +355,10 @@ public PgopStat(long newly, long cow, long clone, long split, long merge, long s
 			this.spill = spill;
 			this.unspill = unspill;
 			this.wops = wops;
+			this.prefault = prefault;
+			this.mincore = mincore;
+			this.msync = msync;
+			this.fsync = fsync;
 		}
 
 		public long getNewly() {
@@ -384,6 +393,22 @@ public long getWops() {
 			return wops;
 		}
 
+		public long getPrefault() {
+			return prefault;
+		}
+
+		public long getMincore() {
+			return mincore;
+		}
+
+		public long getMsync() {
+			return msync;
+		}
+
+		public long getFsync() {
+			return fsync;
+		}
+
 		@SuppressWarnings("nls")
 		@Override
 		public String toString() {
@@ -396,6 +421,10 @@ public String toString() {
 					", spill=" + spill +
 					", unspill=" + unspill +
 					", wops=" + wops +
+					", prefault=" + prefault +
+					", mincore=" + mincore +
+					", msync=" + msync +
+					", fsync=" + fsync +
 					"}";
 		}
 	}
diff --git a/mdbxjni/src/main/java/com/castortech/mdbxjni/MDBXException.java b/mdbxjni/src/main/java/com/castortech/mdbxjni/MDBXException.java
index f864629..bf3a7cf 100644
--- a/mdbxjni/src/main/java/com/castortech/mdbxjni/MDBXException.java
+++ b/mdbxjni/src/main/java/com/castortech/mdbxjni/MDBXException.java
@@ -29,16 +29,21 @@ public class MDBXException extends RuntimeException {
 	@SuppressWarnings("nls")
 	public enum Status {
 		OK(0, "OK"),
+		ENODATA(JNI.MDBX_ENODATA, "Handle EOF"),
 		EINVAL(JNI.MDBX_EINVAL, "Invalid Parameter"),
 		EACCES(JNI.MDBX_EACCESS, "Access Denied"),
-		ENODATA(JNI.MDBX_ENODATA, "Handle EOF"),
 		ENOMEM(JNI.MDBX_ENOMEM, "Out of Memory"),
 		EROFS(JNI.MDBX_EROFS, "File Read Only"),
 		ENOSYS(JNI.MDBX_ENOSYS, "Not Supported"),
 		EIO(JNI.MDBX_EIO, "Write Fault"),
 		EPERM(JNI.MDBX_EPERM, "Invalid Function"),
 		EINTR(JNI.MDBX_EINTR, "Cancelled"),
+		ENOFILE(JNI.MDBX_ENOFILE, "File not found"),
+		EREMOTE(JNI.MDBX_EREMOTE, "Remote storage media error"),
+		RESULT_FALSE(JNI.MDBX_RESULT_FALSE, "Alias for Successful result"),
+		RESULT_TRUE(JNI.MDBX_RESULT_TRUE, "Successful result with special meaning or a flag"),
 		KEYEXIST(JNI.MDBX_KEYEXIST, "key/data pair already exists"),
+		FIRST_LMDB_ERRCODE(JNI.MDBX_FIRST_LMDB_ERRCODE, "The first LMDB-compatible defined error code"),
 		NOTFOUND(JNI.MDBX_NOTFOUND, "key/data pair not found (EOF)"),
 		PAGE_NOTFOUND(JNI.MDBX_PAGE_NOTFOUND, "Requested page not found - this usually indicates corruption"),
 		CORRUPTED(JNI.MDBX_CORRUPTED, "Located page was wrong type"),
@@ -51,29 +56,24 @@ public enum Status {
 		TXN_FULL(JNI.MDBX_TXN_FULL, "Transaction has too many dirty pages"),
 		CURSOR_FULL(JNI.MDBX_CURSOR_FULL, "Cursor stack too deep - internal error"),
 		PAGE_FULL(JNI.MDBX_PAGE_FULL, "Page has not enough space - internal error"),
+		UNABLE_EXTEND_MAPSIZE(JNI.MDBX_UNABLE_EXTEND_MAPSIZE, "Database engine was unable to extend mapping, e.g. since address space is unavailable or busy"),
 		INCOMPATIBLE(JNI.MDBX_INCOMPATIBLE, "Operation and DB incompatible, or DB type changed."),
 		BAD_RSLOT(JNI.MDBX_BAD_RSLOT, "Invalid reuse of reader locktable slot"),
 		BAD_TXN(JNI.MDBX_BAD_TXN, "Transaction must abort, has a child, or is invalid"),
 		BAD_VALSIZE(JNI.MDBX_BAD_VALSIZE, "Unsupported size of key/DB name/data, or wrong DUPFIXED size"),
 		BAD_DBI(JNI.MDBX_BAD_DBI, "The specified DBI was changed unexpectedly"),
 		PROBLEM(JNI.MDBX_PROBLEM, "Unexpected problem - Transaction should abort"),
+		LAST_LMDB_ERRCODE(JNI.MDBX_LAST_LMDB_ERRCODE, "The last LMDB-compatible defined error code"),
 		BUSY(JNI.MDBX_BUSY, "Another write transaction is running"),
+		FIRST_ADDED_ERRCODE(JNI.MDBX_FIRST_ADDED_ERRCODE, "The first of MDBX-added error codes"),
 		EMULTIVAL(JNI.MDBX_EMULTIVAL, "The mdbx_put() or mdbx_replace() was called for key, that has more that one associated value."),
 		BAD_SIGNATGURE(JNI.MDBX_EBADSIGN, "Bad signature of a runtime object(s), this can mean: - memory corruption or double-free; - ABI version mismatch (rare case)"),
 		WANNA_RECOVERY(JNI.MDBX_WANNA_RECOVERY, "Database should be recovered, but this could NOT be done automatically right now (e.g. in readonly mode and so forth)."),
 		KE_YMISMATCH(JNI.MDBX_EKEYMISMATCH, "The given key value is mismatched to the current cursor position, when mdbx_cursor_put() called with MDBX_CURRENT option."),
 		TOO_LARGE(JNI.MDBX_TOO_LARGE, "Database is too large for current system, e.g. could NOT be mapped into RAM."),
 		THREAD_MISMATCH(JNI.MDBX_THREAD_MISMATCH, "A thread has attempted to use a not owned object, e.g. a transaction that started by another thread."),
-		RESULT_FALSE(JNI.MDBX_RESULT_FALSE, "Alias for Successful result"),
-		RESULT_TRUE(JNI.MDBX_RESULT_TRUE, "Successful result with special meaning or a flag"),
-		FIRST_LMDB_ERRCODE(JNI.MDBX_FIRST_LMDB_ERRCODE, "The first LMDB-compatible defined error code"),
-		UNABLE_EXTEND_MAPSIZE(JNI.MDBX_UNABLE_EXTEND_MAPSIZE, "Database engine was unable to extend mapping, e.g. since address space is unavailable or busy"),
-		LAST_LMDB_ERRCODE(JNI.MDBX_LAST_LMDB_ERRCODE, "The last LMDB-compatible defined error code"),
-		FIRST_ADDED_ERRCODE(JNI.MDBX_FIRST_ADDED_ERRCODE, "The first of MDBX-added error codes"),
 		TXN_OVERLAPPING(JNI.MDBX_TXN_OVERLAPPING, "Overlapping read and write transactions for the current thread"),
 		LAST_ADDED_ERRCODE(JNI.MDBX_LAST_ADDED_ERRCODE, "The last added error code"),
-		ENOFILE(JNI.MDBX_ENOFILE, "?? no description"),
-		EREMOTE(JNI.MDBX_EREMOTE, "?? no description"),
 		;
 
 		private final int code;
diff --git a/mdbxjni/src/main/java/com/castortech/mdbxjni/Transaction.java b/mdbxjni/src/main/java/com/castortech/mdbxjni/Transaction.java
index a1163e0..28a8980 100644
--- a/mdbxjni/src/main/java/com/castortech/mdbxjni/Transaction.java
+++ b/mdbxjni/src/main/java/com/castortech/mdbxjni/Transaction.java
@@ -61,7 +61,7 @@ public long getId() {
 	 * must be called before a reset transaction may be used again.
 	 */
 	public void renew() {
-		checkErrorCode(env, mdbx_txn_renew(pointer()));
+		checkErrorCode(env, this, mdbx_txn_renew(pointer()));
 	}
 
 	/**
@@ -78,7 +78,7 @@ public void renew() {
 	 */
 	public void commit() {
 		if (self != 0) {
-			checkErrorCode(env, mdbx_txn_commit(self));
+			checkErrorCode(env, this, mdbx_txn_commit(self));
 			self = 0;
 		}
 	}
@@ -86,7 +86,7 @@ public void commit() {
 	public CommitLatency commitWithLatency() {
 		if (self != 0) {
 			MDBX_commit_latency rc = new MDBX_commit_latency();
-			checkErrorCode(env, mdbx_txn_commit_ex(self, rc));
+			checkErrorCode(env, this, mdbx_txn_commit_ex(self, rc));
 			self = 0;
 			return new CommitLatency(rc);
 		}
@@ -132,12 +132,12 @@ public void abort() {
 	}
 
 	public void broken() {
-		checkErrorCode(env, mdbx_txn_break(pointer()));
+		checkErrorCode(env, this, mdbx_txn_break(pointer()));
 	}
 
 	public TxnInfo info(boolean scanRlt) {
 		MDBX_txn_info rc = new MDBX_txn_info();
-		checkErrorCode(env, mdbx_txn_info(pointer(), rc, scanRlt ? 1 : 0));
+		checkErrorCode(env, this, mdbx_txn_info(pointer(), rc, scanRlt ? 1 : 0));
 		return new TxnInfo(rc);
 	}
 
diff --git a/mdbxjni/src/main/java/com/castortech/mdbxjni/Util.java b/mdbxjni/src/main/java/com/castortech/mdbxjni/Util.java
index c9ba9fa..9d8725e 100644
--- a/mdbxjni/src/main/java/com/castortech/mdbxjni/Util.java
+++ b/mdbxjni/src/main/java/com/castortech/mdbxjni/Util.java
@@ -28,6 +28,7 @@
  *
  * @author <a href="http://hiramchirino.com">Hiram Chirino</a>
  */
+@SuppressWarnings("nls")
 class Util {
 	public static final boolean isAndroid = isAndroid();
 
@@ -57,6 +58,16 @@ public static void checkErrorCode(Env env, int rc) {
 		}
 	}
 
+	public static void checkErrorCode(Env env, Transaction txn, int rc) {
+		if (rc != JNI.MDBX_SUCCESS && rc != JNI.MDBX_RESULT_TRUE) {
+			String msg = string(mdbx_strerror(rc));
+			if (env != null) {
+				System.err.println("MDBX Exception. Msg:" + msg + ", Env:" + env.info(txn).toString());
+			}
+			throw new MDBXException(msg, rc);
+		}
+	}
+
 	public static void checkSize(final Env env, final Value val) {
 		long size = val.getOffendingSize(env.getMaxKeySize());
 
diff --git a/readme.md b/readme.md
index fb41a7b..ab49f28 100644
--- a/readme.md
+++ b/readme.md
@@ -3,7 +3,7 @@
 ## Description
 
 MDBX JNI gives you a Java interface to the 
-[libmdbx](https://github.com/leo-yuriev/libmdbx) library
+[libmdbx](https://gitflic.ru/project/leo-yuriev/libmdbx) library
 which is a fast key-value storage library written for ReOpenLDAP project
 that provides an ordered mapping from string keys to string values.