doh123 wrote: > you have some program made for Wine that is using Explorer? or its some windows program thats using that as a command line argument to open files? Sounds like a really lazy programmer to do something like that.... > It's a windows program, in fact it's SBClient (SystemBuilder from http://www.rocketsoftware.com/u2/) and yes it shoots a pdf opening command using explorer.exe. doh123 wrote: > heck you could always try to make a dedicated bottle just for this one program and rename start over to explorer and see what happens :-) I could but I don't think I have to..I think I've found the troublemaking piece: start.exe was called but this is non-existent on Windows..hence the trouble. start is an internal MSDOS command and hence is called by just typing Code: start c:\myfile.pdf . cheers.