Serial no tracking in Production order/ MFBF of subassemblies into creation of finished parts

Hi PP gurus,

I have created a scenario where serial no profile is applicable to both final assembly and sub assembly.

When I doing GR for final assembly how can I enter sub-assembly with specific serial number (or track it further which serial nu was used to creat certain serial number assembly) , please guide.

I have tried serial no profile for both repetitive and discrete scenario.

I tried using MMSL profile as well in combination of PPAU/PPSF but when I go for production booking I get error " Only 0 serial numbers entered instead of 1" where can I put serial number for compnent for Goods issue.

I searched many threads but couldnt get the solution.

Regards

Harshal