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When either creating a layout based on an existing template or creating a new template, the following error occurs:
Unknown Object "SpAnEnv. 10719" in Project "C:\TEMP\template.def"
"Template file is invalid. Please check your installation."
Note that the number following 'SpAnEnv' can be any number.
A layout template found at the location specified in the error message was created when the Spatial Analyst extension loaded.
The following are two options which allow you to work around this error.