Invalid ADATA File.
This error can occur while attempting to extract source program mapping information from an assembly ADATA file. It indicates that no source type records (type X'0030') were found in the ADATA file or no Job ID (type X'0000') record was found. Either of these conditions probably indicate an invalid ADATA file.
The ISPF dialog is terminated.
Recreate the ADATA file by reassembling the program in error and retry the operation.