Batch Macro to do mapping

Hi,

I am new to the macro world and designing a macro to help on a mapping action.

I have 2 tables,

Table A:

Table B:

And I have to look up the table A segment in table B to create something like below table and stack up for all segments.

But i come across the error

I understand this action may not actually need a macro to complete but I want to understand more on the sequence of batch macro's excution and how to deal with an error.

Thanks so much.