Autoenter serial in portal

[tsd]

Hi !

I am a newbie about filemaker,.

I have 1 database (drawings.fp5) with drawingnr 100-110.

And i have 1 database (Releases.fp5) related with drawingnr.

This database contain multiple 100, 101, ... drawings.

In drawings.fp5 i have a portal showing releases 01,02, and so on.

When user press new release in drawing.fp5 i want filemaker to autoenter release 03 in portal. I can

[tsd]

I found this Count( relationship::serial ). That seems useful. I give it a try, but pleas post if any other suggestions.