String manipulation error

Please see error message attached. I have no idea how to correct this. Please help!

Invalid settings:

Unable to compile expression

ERROR at line 60 

The method substr(java.lang.String,int)in the type 

org.knime.base.node.preproc.stringmanipulatio.manipulator.SubstringOffsetManipulator is not applicable for the arguments


What is the expression that you entered in the dialog?