strange behavior

Hello,
when i do search for studies between dates like from 01.02.2020 to 03.02.2020 no results - like the studies doesnt exist in database but when i add another parameter like institution name everything is fine.
No idea why — earlier it worked without problems.

Hello,

We need more context to understand what is your issue about: Is it related to Orthanc Explorer, to the REST API, to DICOM C-FIND…?

Please provide full explanations and a minimal working example so that the Orthanc community can help you:
https://book.orthanc-server.com/users/support.html#discussing-a-minimal-working-example

Sébastien-

It's related to dicom c-find.

Now, as written above, please provide minimal working example:
https://book.orthanc-server.com/users/support.html#discussing-a-minimal-working-example