remove group doesn't work

[Jim McNeely]

I have the following in a certain handler:

put the groupNames of card "patient_insurance" into tGroupCheck
if "insurance2" is among the lines of tGroupCheck then remove group  
"insurance2" from card "patient_insurance"

Sometimes it will error on the second line, and I can't figure out  
why. I don't think it is because it isn't there, it is checking for  
that first.

It gives this error:

field "resultList": execution error at line 132 (Chunk: can't find  
background), char 59

Thanks,

Jim McNeely