Hi Shuhei-- Isodat service pack 1.42 is last one before upgrading to WinXP Service Pack 2.0. Dual Inlet was misbehaving in the 1.38 service pack--it was behaving better in 1.41, with some other changes on going to 1.42. Checkout the read-me file for the latest patch--it gives some of the history of the preceeding patches. take care gerry Shuhei Ono wrote: > Dear ISODAT 2.0 users > > I am using MAT 253 with ISODAT NT 2.0 with service pack 1.39 installed. > I have been very frustrated with pressure balance for dual inlet, and > I am soliciting some inputs now. I am typing in numbers for bellow > percent but it often misbehaves. I have never worked out with > automatic pressure balance function because it keeps overshooting; I > can do much better job by manually. A pair of triangles under bellows > do not work at all. I was recommended to try new service pack but am > not sure if it comes with some extra that cause other troubles. Any > inputs from you will be the most appreciated. > > Many thanks and have a nice weekend! > > Shuhei > > -- > Shuhei Ono > Geophysical Laboratory >