problem with HR_INFOTYPE_OPERATION

When I execute the function HR_INFOTYPE_OPERATION, it gives a runtime error or DUMP..

i gave the values as

INFTY-0002

NUMBER-1323

validityENDDATE-31.12.9999

validityBEGINDATE-02.03.1961

Record-pa0002.

The Error is:

*The source field is too short.

The current program, "SAPLHRMM", tried to assign a field to a field symbol.

However, the field is shorter than the type of the field symbol, which

is not allowed.

The statement in question is in the form ASSIGN f TO <fs> CASTING or

ASSIGN f TO <fs> with a field symbol that was created using the

STRUCTURE addition. *

how to correct it?