[API error 400] The parameter planperiod_start is generated and cannot be used in a filtering

Developers & API
1

Hello,

My prompt is :

"Do you have any projects planned for June 2026? "

or

"Please provide me with a PDF of all the staff scheduled for next week across all projects in Rentman. "

And what I have is this :

“{“action”:“list”,“filter”:{“planperiod_start[gte]”:“2026-06-01”,“planperiod_start[lte]”:“2026-06-30”},“fields”:“id,name,planperiod_start,planperiod_end”,“limit”:1500}”

{“value”:“Error executing tool rentman_projects: Error: API error 400: {“errorType”: “string”, “errorMessage”: “[400] The parameter planperiod_start is generated and cannot be used in a filtering query”, “trace”: }”}

Do you have any idea how to proceed ?

Same error with ChatGPT, Claude and Mistral.

Thanks.

2

Hello,

Any help on this ?

Thanks.

3

Hello! Thank you for reaching out @Alexandre_FLEURET and sharing your experience. We are working on a fix, but in the meantime you could tell your AI that they should not try to use computed/aggregated/derived fields in searches. This will hopefully prompt the agent to try a different route. Could you please try and let us know if it worked?

4

Better yes. Really slow to answer but it’s working. it seems to request a lot of data for one question. Requested all projects. Should be better to have a timeframe window request.