On some occasions, E-Studio files (.es2) was being deleted during an attempted save operation.
Internal Design Flaw
Update to E-Prime 18.104.22.1686 (SP2)
In some cases the E-Studio experiment specification file (*.es or *.es2) was deleted from the current working directory when a save operation was attempted. This problem was more likely to occur while working with a very large experiment. The file deletion occurred regardless of whether the end user or E-Studio initiated the file save operation. For example, whenever the "Generate" experiment option is selected, E-Studio attempts to save the experiment file prior to generating the script. If this problem occurred after attempting to Generate, it may have appeared that the file was deleted as part of the script generation process when in fact it occurred when E-Studio attempted to first save the file.
E-Studio includes an option to automatically create a backup copy of the experiment specification file each time a successful save operation occurs. This option is enabled by default. Therefore, users who encountered the file deletion problem but had the automatic backup feature enabled could retrieve a copy of their most recent successful save. To check the status of the automatic backup feature, select "Options…" from the "Tools" menu, select the General tab and examine the "Experiment Backup" feature.
Each time a successful save occurs, E-Studio creates a copy of the es2 file and names it ExperimentBackupn, where n is a counter. The first file that is saved is named ExperimentBackup0.es2, the second file saved is named ExperimentBackup1.es2, and so on. Note that the automatic backup feature works across all E-Studio sessions that are run on an individual computer and therefore across all experiments that are edited in E-Studio.
For users who are not able to update to E-Prime 2.0 SP2 at this time, the following workarounds are available:
- Enable automatic backups as described above
- Retrieve the automatic backup if your experiment specification file is deleted
To retrieve a backup, click on the "Copy backup experiments to the desktop" button and answer "Yes" when prompted to confirm. The backups will be copied to the folder "E-Studio Experiment Backups". You might find it helpful to sort the results by date so that the most recently created backup will appear at the top of the list. This technique may help you to more quickly identify the file of interest.
- Save often while editing your experiment in E-Studio. Although this bug is seen after an attempted save operation, you should still save frequently because:
- This problem occurs rarely.
- With frequent saving, the automatic backup copy will contain more of your recent work.
- Follow best practices to keep you experiment as small as possible. Refer to the See Also section below for further information.
This article applies to:
INFO: Should I Update to E-Prime 2.0 SP2? 
INFO: Steps to Avoid "Script Too Large to be Compiled" Errors