IDOC RBDMIDOC - Internal error: Program read table idoc_structure

Hi,

We have scheduled background program RBDMIDOC for master data thru change pointers.

This was running successfully for years. Suddenly since past few days the error is coming as below :

Internal error: Program read table idoc_structure, command data_select_for_block, argument Z******

I had searched SDN forum and in all post its suggested that - set P_CIMTYP = 'Z******'. This is have done but still error persists.

Any other solution.

Thanks