Hello,
Expected Behavior - Union two parts together a negativepart cylinder and a union block.
Actual Behavior - Error code pops up CSG returned error code -14.
Reproduction Steps - union the two parts together in any place even a blank baseplate.
We have tested unioning a negativepart cylinder and a union block and can’t reproduce your problem. In terms of your error code, your failure should be due to the number of result triangles in the resulted union exceeding allowed limit. One of the parts (probably the unionTile) must be complicated enough and already has high triangle counts. One possible workaround is to split the unionTiles and perform union separately.
Would you be able to include model or DM-me the model so we can repro the problem.