lost dll file lost dll file akh (TechnicalUser) (OP) 1 Jan 02 12:22 I've suddenly started to get a messages that I've done an illegal operation and then that psap.dll is missing. I've tried reinstalling but get the same message. I can't find this file anywhere. RE: lost dll file james33 (TechnicalUser) 2 Jan 02 08:26 Dear akh,Just to get things straight, are you using Sidekick at the time it displays the error message? Or if you aren't, is any version of Sidekick installed on your Computer?Please let us know, if it is installed, what version you are using.I have Sidekick98 installed on my computer and I can't find psap.dll either.