topic bad parameter or other API misuse in FlexSim Forum

bad parameter or other API misuse

AmirKhezri — Tue, 28 Oct 2025 13:21:52 GMT

[FlexSim 25.2.0]

Hello, I’m encountering an issue when running my simulation experiments in parallel over long durations (ranging from one week to one month). However, the problem does not occur when I run the experiments for shorter periods (e.g., one day) or when I execute them sequentially.

The error message is as follows :

FlexScript exception: SQLite Error 21 - bad parameter or other API misuse - in query: SELECT change_count FROM jobs WHERE id = ? at MAIN:/project/library/Experimenter>behaviour/eventfunctions/getJobChangeCount at line 0 c: MODEL:/Tools/Experimenter

Has anyone experienced this issue or knows how to resolve it?

Thank you in advance for your help.

Re: bad parameter or other API misuse

FelixMoehlmann — Tue, 28 Oct 2025 13:23:03 GMT

Saying "or when I execute them sequentially" makes it sound like you are running multiple jobs in parallel. If they use the same sqlite database file than getting errors is not suprising. Only a single job should access those at a time.

If they use different database files than I don't know what the issue could be. Though I don't know if starting multiple jobs from the same FlexSim instance is supported.

Re: bad parameter or other API misuse

AmirKhezri — Tue, 28 Oct 2025 13:40:18 GMT

moehlmann_fe Thank you for your reply!

Maybe I wasn’t clear earlier — I’m not running multiple FlexSim instances in parallel. The parallelization I mentioned refers to the internal parallelization within the simulation itself (as shown in the Experimenter settings, e.g., “Max Cores”).