You might want to change tactics a bit.  Add L.Temp006 right after L.Temp003 and make it a calculated field pointing to your amount column (23?), Assign on Line Records.  Then add L.Temp007 numeric calc. field and calculate as Temp007+Temp006. This will add the amounts of each line to Temp007 until completed.  

I also noted you have L.AccountKey twice, it looks like you want to assign account 220 at the end.  That probably won't work the way you have it.  If you could identify the last record in the source file, you could use that value to put two conditionals in, one for (if the last record value is not there, assign debit L.AccountKey line)  and if the value is there, assign credit L.AccountKey, using the built up Temp007 amount., also with the same conditional.  They both can't be assigned on the same pass.  

These things tend to lead to more questions, but wanted to get you thinking in a different direction.  Good Luck!

You might want to change tactics a bit.  Add L.Temp006 right after L.Temp003 and make it a calculated field pointing to your amount column (23?), Assign on Line Records.  Then add L.Temp007 numeric calc. field and calculate as Temp007+Temp006. This will add the amounts of each line to Temp007 until completed.  

I also noted you have L.AccountKey twice, it looks like you want to assign account 220 at the end.  That probably won't work the way you have it.  If you could identify the last record in the source file, you could use that value to put two conditionals in, one for (if the last record value is not there, assign debit L.AccountKey line)  and if the value is there, assign credit L.AccountKey, using the built up Temp007 amount., also with the same conditional.  They both can't be assigned on the same pass.  

These things tend to lead to more questions, but wanted to get you thinking in a different direction.  Good Luck!

thanks, it makes sense.  I'll work it though.