some error massage

[smallstudent2021]

ImageJ 1.54d; Java 1.8.0_345 [64-bit]; Windows 10 10.0; 98MB of 24520MB (<1%)

java.lang.NumberFormatException: For input string: "(CaO)2SiO2"
at sun.misc.FloatingDecimal.readJavaFormatString(FloatingDecimal.java:2043)
at sun.misc.FloatingDecimal.parseDouble(FloatingDecimal.java:110)
at java.lang.Double.parseDouble(Double.java:538)
at java.lang.Double.(Double.java:608)
at xjava.cluster.xClusterImageF.readCenters(xClusterImageF.java:1764)
at xCluster_Image.clustering(xCluster_Image.java:1958)
at xCluster_Image.run(xCluster_Image.java:723)
at ij.plugin.filter.PlugInFilterRunner.processOneImage(PlugInFilterRunner.java:266)
at ij.plugin.filter.PlugInFilterRunner.(PlugInFilterRunner.java:114)
at ij.IJ.runUserPlugIn(IJ.java:246)
at ij.IJ.runPlugIn(IJ.java:210)
at ij.Executer.runCommand(Executer.java:152)
at ij.Executer.run(Executer.java:70)
at java.lang.Thread.run(Thread.java:750)