I'm reporting an issue and solution involving the Raster Calculator tool in ArcToolbox for ArcGIS 10. Raster Calculator works fine until I include a trig function such as Cos(). When my expressions include a trig function, I get this error message upon execution:
ERROR 000539: Error running expression: rcexec() <type 'exceptions.RuntimeError'>: No CellSize and Extent set
A simple expression which produces this error is Cos(0)*"myraster".
To resolve the issue, I click Environments in the Raster Calculator window, and then set the Extent (under Processing Extent) and Cell Size (under Raster Analysis) to be "Same as layer myraster." The tool then executes correctly, although it does warn me that the input and output datums don't match (even though they do appear to match).
I'm curious why using Cos() requires extents and cell sizes to be explicitly set. But at least there's a workaround.
ERROR 000539: Error running expression: rcexec() <type 'exceptions.RuntimeError'>: No CellSize and Extent set
A simple expression which produces this error is Cos(0)*"myraster".
To resolve the issue, I click Environments in the Raster Calculator window, and then set the Extent (under Processing Extent) and Cell Size (under Raster Analysis) to be "Same as layer myraster." The tool then executes correctly, although it does warn me that the input and output datums don't match (even though they do appear to match).
I'm curious why using Cos() requires extents and cell sizes to be explicitly set. But at least there's a workaround.
Cos("test_elevation")
When I tried
Cos(0) * "test_elevation"
I got the same message you get. Next I tried
"test_elevation" * Cos(0)
and still get the error, so the order of inputs does not matter. I am not sure if this is expected or not. I would log an incident with Support to verify if this should be functioning like this since Cos("test_elevation") works without error.