Free Selection fields in F110

Hello Experts,

I have an issue with F110 free selection tab, system recoganizing the 1st field name of free selection to make posting particular field name and values. Example 1st field I consider document number and I am mentioned with few document numbers (100,101,102) and I could able to exclude or include in payment proposal and payment posting successfully.

Where as when I selected the 2nd Field Name and 3rd field Name as document numbers (or any other reference) and with values system not able to process the entire program and throughing the standard error like "co code xxx donot appear in proposal 08/10/2011 ASK1" But when run for the only one field system succssfully simulating the F110 payment prposal and even posting also.

I am not sure why system behaving like that, is there any config issue ? I checked all document are open items and also no payment blocks etc.,

My requirement is system should recoganize the all 3 Field names so that my user can make the payment documents exclude or include in F110.

If anybody come across this type of issue, please share your knowledge.

Awaiting your resonses.

Thanks & REgards

Aditya