problems with structures

I have my model running but with no outlet, everything seems to work fine. As soon as i add an outlet in the form of a structure the model won't run. (W2 won't run at all, and the preprocessor freezes on the inflow/outflow card) I don't get any info in the pre.err/wrn files or the w2.err/wrn files. here's how the w2_con file is setup **************************************** N STRUC NSTR BR1 3 STR INT STRIC STRIC STRIC STRIC STRIC STRIC STRIC STRIC STRIC BR 1 ON ON ON STR TOP KTSTR KTSTR KTSTR KTSTR KTSTR KTSTR KTSTR KTSTR KTSTR BR1 22 34 2 STR BOT KBSTR KBSTR KBSTR KBSTR KBSTR KBSTR KBSTR KBSTR KBSTR BR1 37 37 4 STR SINK SINKC SINKC SINKC SINKC SINKC SINKC SINKC SINKC SINKC BR1 POINT POINT LINE STR ELEV ESTR ESTR ESTR ESTR ESTR ESTR ESTR ESTR ESTR BR1 1246.00 1238.00 1263.50 STR WIDT WSTR WSTR WSTR WSTR WSTR WSTR WSTR WSTR WSTR BR1 0.00000 0.00000 100.000 **************************** and i have my outflow file (qot_br1) as follows JDAY QOUT QOUT QOUT 100.000 7.22 0.71 0.30 -- I know it's the structures that are causing the model to crash, i just don't know how to fix it. are there any other cards that i need to alter to get this to work? thanx Wally [addsig]