Error in subroutine READ_NAMTB

Hi,

While posting an idoc through the test tool WE19, we are encountering an error 'Error in subroutine READ_NAMTB for structure of infotype'. We are using the extended idoc type ZRMD_A06 with a custom segment containing the PERNR and some other details.

Are we missing out on something?Please advise!

Thanks in advance!

Regards,

Nejuma Iqbal