problem editing data using SM30 - view dumps

hi there.

I got a table that contains interface data. Z-table.

No unluckily the client wants to edit the table content using tcode SM30. As the table contains some fields of type string I cannot generate a maintenance view on the table itself.

no problem with that. I try to get around that generating a maintance view that does not include the string fields and I do generate a maintenance view for that. So far everything works out fine.

But: once I try to call SM30 for the new maintenance view then it dumps.

Does anyone have a clue how to get around that?

Thanks for an answer.

Rob

p.s.

SAP-Release

EHP6 FOR SAP ERP 6.0

SAP_ABA 731

SAP_BASIS 731