Errors using Merge Stage but improvement with file set stage

[nivas]

Hi

I am trying to merge two table using Merge stage on one column.
In the properties Tab I provided value for KeyProperty=ACC_NBR and
Sort order is default.
I am getting the following error
But when I tried by putting FileSet Stage after Merge Stage the error has gone.
Could any body help me please to fix this error asap.



main_program: Sort key "ACCT_NBR" no longer exists in dataset schema. It will be dropped from the inserted sortmerge collector

main_program: There are no sort keys in the dataset schema. No parallel sortmerge operator will be inserted.

subArgs={asc}}},1: Failure during execution of operator logic
subArgs={asc}}},1: Output 0 produced 0 records
subArgs={asc}}},1: Fatal Error: Fork failed: Resource temporarily unavailable


thanks
Nivas

[T42]

The input dataset does not have ACCT_NBR.

Check your metadata in the job.