ArcGIS Pro 3.4.2: The “Raster Calculator” tool fails and ends with the error “Could not save raster dataset to RasterC_6 with output format FGDBR.”

[JamalNUMAN]

ArcGIS Pro 3.4.2: The “Raster Calculator” tool fails and ends with the error “Could not save raster dataset to RasterC_6 with output format FGDBR.”

In the screenshot below, I couldn’t figure out why the “Raster Calculator” tool fails and ends with the following error:
Could not save raster dataset to RasterC_6 with output format FGDBR.

What could be the issue here?

[DuncanHornby]

I think the source of the problem is the error 000539. Looking at your naming convention you are using, I'm going to guess that the input raster is INTEGER? If you need to retain it in integer, then rather than multiple by 0.5 try dividing by 2? Or convert the raster to a float.

[JamalNUMAN]

What’s frustrating is that ArcGIS Pro—specifically the model builder—is not stable. With the same settings, it sometimes works as if there were never an issue. Then, after a while, running the model again triggers the same error.

Is this a bug? We never encountered such issues in ArcMap when working with rasters.

[Robert_LeClair]

Perhaps you've seen these tools and errors warnings here:
010240: Could not save raster dataset to <value> with output format <value>.—ArcGIS Pro | Documentat...
Solved: Receiving Error 000539/Error 010240 when trying to... - Esri Community

Also, what is your bit depth for all the inputs, intermediate data, and outputs?  Are they the same?