AX 4 EmplTable - Please help

hugon

Hi All
I've created new table axtable_1 with some information:

descrition | periodFromDate | periodToDate

and I have new field EmplTable.field1 in EmplTable on each employee

empl01 | field1
empl02 | field2 ...

During opening EmplTable I need system check axtable_1 if system date belong to this period, system should put description to EmplTable.field1

Could you help me with this?

Thank you in advance
Hugon