IDOC to file,how to set the filename based on time ?

     Hi ,

I am doing this Scenario , IDOC  --- > PI ----> File

My reuirement is to set the file name like " filename_YYYYMMDD_HHMMSS.dat ".

A group of idocs are triigered in ECC based on the requirement using POIM transactiion , but some idocs are triggering with 1 or 2 secends delay, so i am unable to append this idocs to the same file which is generated by previous idocs.

For Ex: Out of 200 idocs first 150 idocs having the same time, and rest are delayed by 1 or 2 secs.

How can i achieve this, please help me to combine all the idocs information into a single file .. ?

Thanks,

Dhileep