Run-time error -17306 in plugin result

Hello all, 

I have developed a sequence in which I record several results in the report.

But sometimes I get this error at the end of the test, when I run the result processor

I can't figure out what the bug is because the error appears unpredictably and sometimes it doesn't even appear

I attach a screenshot to this message

any clarification is welcome.

Thanks.

Chakib,