The project is just a table. It can become corrupt like any other table if the network is flakey or you shut down the computer while it is running etc...

Personally, I don't attempt to rebuild the table, I delete the project *.pj? files, then create a new project and add in the main file then rebuild.

>When trying to rebuild my project, I get a message: "Project File invalid". Pressing Help only shows: "The project file has become corrupt" Gulp! This sounds catastrophic!!! Please tell me there is a way to fix this.
>What causes this? My program started to show a strange behavior by giving messages about files and forms not found. Then, the project manager showed the icon of a form but without any form description and couldn't delete because obviously it wasn't found.
>Any input will be greately appreciatted.
>
>Ulises.