arrayLength() on collection of DataCell

Hello,

Extract Table Spec can create a collection of possible values and this is a collection of DataCell. But in Column Expressions, arrayLength() can’t evaluate : “An error occurred during the execution of the script: Error occurred during column access of column ‘Possible Values’: Cannot invoke “org.knime.core.data.convert.java.DataCellToJavaConverterFactory.getDestinationType()” because “elementConverterFactory” is null”

GroupBy is sufficient of course but it will be useful to have this possibility directly after Extract Table Spec.

May I miss something ?

Best regard,

Joel