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Unable to Flush/Upload/Save/Compress logs. for experiment

URL of experiment:

Description of the problem:
After completion of the experiment the following error appears. The experiment is supposed to take the participant to another Pavlovia URL after this experiment and I wonder whether this could be the problem. This has never happened before however when running this task.

Any help much appreciated,

Best wishes,


Hi Seline,

Is it possible that you have slashes (/) in the participant id (e.g. /12/01/22 2)?


Thank you for the quick reply. I do indeed, is this problematic for Pavlovia?

Thank you so much. Removing the (/) solved the problem for me. I wasn’t aware these caused an error in Pavlovia when inputting a participant ID, will remember for the future.

Many thanks,


Hello Seline,

each operating system contains a number of reserved characters which should not be used in file- or foldernames, e.g., , /, :, *, ?, ", <, >, |

Best wishes Jens