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Improved Modified Chlorophyll Absorption Ratio Index used by the Indices tool does not work.

by Technical Evangelist on ‎04-08-2016 05:04 PM (991 Views)


When you attempt run the Indices tool in ERDAS IMAGINE 13.00 with the MCARI2 index you will receive an error message which says: “Spatial Model failed in SquareRoot(R670). Error: Empty data on port.”



We have fixed the MCARI2 model and attached it to this article.


  1. Download the attached file “” and extract the file "mtvi2.gmdx".
  2. Go to the IMAGINE home folder and navigate to the “etc\models” directory.
  3. Rename the existing file from “mtvi2.gmdx” to “mtvi2.gmdx_original”.
  4. Copy the new updated file “mtvi2.gmdx” into this directory.

Now you can use the Indices tool with the MCARI2 index.

by dan
on ‎12-10-2016 03:21 AM

Thank you.