master data not sorted while using grmap

[rajaram]

Dear Esteemed members,

I am getting an error when using the "grmap" command.

grmap primary
master data not sorted
r(5);

I tried sorting the variable _ID and also _CX and _CY variables, but still, I am getting this error. Not sure which data needs to be sorted.

Thanks in advance.

Best regards,

Rajaram S