Burn in option in watershed delineation - Error

[Colline Gombault]

Hello to all, 

I have troubles to delineate the watershed while using the burn-in option.

Any tips on how resolving this error in the print screen below ?

The watershed delineation works well with the dem alone, but fails when I want to burn in the stream networks. I have checked the data (projection, extension, used the repair geometry, etc.), and saved everything in a geodatabase, nothing seems to work.

I am using ArcGIS 10.6 with the corresponding ArcSWAT. My PC fits with the requirement stated in the UserGuide and has enough disk space (above 100Gb).

Many thanks if you can help

Colline