diff --git a/newdocs/API-analysis/cookbook-bpp-species-delimitation.ipynb b/newdocs/API-analysis/cookbook-bpp-species-delimitation.ipynb
index 6e6773b3..72f3d124 100644
--- a/newdocs/API-analysis/cookbook-bpp-species-delimitation.ipynb
+++ b/newdocs/API-analysis/cookbook-bpp-species-delimitation.ipynb
@@ -981,7 +981,7 @@
     "A00n = b.copy(name=\"A00-nodata\")\n",
     "\n",
     "## set params on the 'nodata' object to not use seq data\n",
-    "A00n.params.usedata = 0"
+    "A00n.kwargs[\"usedata\"] = 0"
    ]
   },
   {
@@ -3060,15 +3060,15 @@
     "A10n = A00.copy(\"A10-nodata\")\n",
     "\n",
     "## set new params\n",
-    "A10.params.infer_sptree = 1\n",
-    "A10.params.infer_delimit = 0\n",
-    "A10.params.tauprior = (2, 200, 1)\n",
-    "A10n.params.infer_sptree = 1\n",
-    "A10n.params.infer_delimit = 0\n",
-    "A10n.params.tauprior = (2, 200, 1)\n",
+    "A10.kwargs[\"infer_sptree\"] = 1\n",
+    "A10.kwargs[\"infer_delimit\" = 0\n",
+    "A10.kwargs[\"tauprior\" = (2, 200, 1)\n",
+    "A10n.kwargs[\"infer_sptree\" = 1\n",
+    "A10n.kwargs[\"infer_delimit\" = 0\n",
+    "A10n.kwargs[\"tauprior\" = (2, 200, 1)\n",
     "\n",
     "## also set no-data on the 'n' run\n",
-    "A10n.params.usedata = 0"
+    "A10n.kwargs[\"usedata\" = 0"
    ]
   },
   {
@@ -14209,15 +14209,15 @@
     "A01n = A00.copy(\"A01-nodata\")\n",
     "\n",
     "## set new params\n",
-    "A01.params.infer_sptree = 0\n",
-    "A01.params.infer_delimit = 1\n",
-    "A01.params.tauprior = (2, 200, 1)\n",
-    "A01n.params.infer_sptree = 0\n",
-    "A01n.params.infer_delimit = 1\n",
-    "A01n.params.tauprior = (2, 200, 1)\n",
+    "A01.kwargs[\"infer_sptree\" = 0\n",
+    "A01.kwargs[\"infer_delimit\" = 1\n",
+    "A01.kwargs[\"tauprior\" = (2, 200, 1)\n",
+    "A01n.kwargs[\"infer_sptree\" = 0\n",
+    "A01n.kwargs[\"infer_delimit\" = 1\n",
+    "A01n.kwargs[\"tauprior\" = (2, 200, 1)\n",
     "\n",
     "## also set no-data on the 'n' run\n",
-    "A01n.params.usedata = 0"
+    "A01n.kwargs[\"usedata\" = 0"
    ]
   },
   {