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I am using ModelBuilder for ArcGIS Desktop 10.2

I have the following code in the Raster Calcualtor which works in some cases but not in others.

Int(Con(IsNull("%A%")|"%A%"== 0,"%B%",float(%Max%) + "%A%"))

In cases that A is Null I want the code to return the value from B however it is returning a Null. I suspect there is a flaw in the OR syntax but I can't work out what is wrong.

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  • This question suggests that the error may be the % signs around your variables. Seems to be caused by ModelBuilder.gis.stackexchange.com/questions/82889/raster-calculator-error
    – David W
    Nov 26, 2015 at 15:49
  • The % are required by model builder to refer to temporary files. ArcGIS adds them when you click on the required rasters.
    – falcs
    Nov 26, 2015 at 15:52

1 Answer 1

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The problem is in the OR expression. A nested Con() statement works

Int(Con(IsNull("%A%"), %B%, Con("%A%"==0, %B%, float(%Max%) + "%A%")))

Your OR expression seems to be evaluating to NoData and receiving NoData as output. See the help here

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