the Task cannot be closed when exporting #353
Description
After I tried to compile and run on the ubuntu system, I read in a model from test and attempted to export it. However, after the export, the page would remain at Task, and this Task would always exist. At this point, I couldn't use other functions of the software. Sometimes when I force the program to stop running, I find that the files have been exported. However, when reading the exported files, they sometimes read normally, such as exporting in ply format as ply format and in ply format as stl format. Sometimes, however, the Task retention issue does not occur. For instance, when exporting in ply format to step format, the exported file does not have a cube and is an empty file.