Thanks for the suggestions so far. To give a little more detail: I'm using version 3.80 The show has about 130 slides of about .5Mbytes each. There is a single background music track. I abandoned an attempt to use the automatic adjust feature since this didn't work properly. Instead, I simply adjusted the duration per slide to match the music. I haven't used the timeline, just simple arithmetic. Pictures to exe is now in a strange state. Yes, I've tried reinstalling without any benefit. If I start the program by double clicking on my (now failed) project, I get the message Write file error, the program starts, but doesn't open the project. I can then create a new project which works just fine. Having done this and exited, I can then work with all my other presentations. The only change of which I'm aware between the project working and not working. (It happened within an hour or so and I made no deliberate changes outside P2exe) was the introduction of a new slide. I'll check the data file in this area using notepad. I can't, of course, view my settings in P2exe, since it refuses to open the file. Thanks, Brian