NullReference exception error in Calculation view

Hi ,

we are getting NullReference exception error in calculation view while tring to assisgn table data to a internal table :

Error:

column store error: search table error: [2620]<VIEW NAME>: line 365 col 1 (at pos 8699): NullReference exception.

Statement for which error is coming:

AN = Select 'A' as SOURCENAME,'A' as SOURCETYPE,'AA' as TARGETNAME,'AB' as TARGETTYPE, 'A' as TRANID, 'A' as FLAG,'B' as TRANS_FLAG from <TABLE>;

Thanks

Pranay Sharma