VERIFIED SOLUTION i
During the installation of Spectrum Spatial Analyst 12.1 the following warning occurs:
There is no PDF reader on the installation machine.
ResolutionUPDATED: March 9, 2018
You will be able to clear the error by installing a PDF reader. In up coming releases a more meaningful error message will be generated by the installer to let the user know that a PDF reader is not installed on machine.
Product Feature: Spectrum Spatial Analyst