USBX mass storage host possible conflict with emmc?

Hello,

we tryied to add the USBX Mass Storage Host module (from the gallery) to our application. We need to save a log text file into a USB key when inserted, so we added the USB Thread and the usb_thread_entry code into our application.

When we debug the application, even if the new usb_thread is not reached yet, the execution stops at the following error:

Please note that in our application we already manage the eMMC in a separate thread. Is it possible it goes in conflict with the newly added USB thread in some manner?

Here are the configuration for the eMMC Thread and the USB thread:

Any idea on how to solve that error?

Thank you!