Model execution halted

When trying to run the model I am getting error like 'Error: Unexpected error encountered: [vector<T> too long]. Model execution halted.' I have tried converting my Geotiff into only forest and non-forest classes to reduce the data size, tried by converting it into int16 format and ERDAS imagine img format but it is showing the same error. Also, when I input my classified image it is unable to read the size of the image (i.e. rows and columns) and shows -1,-1 instead. What could possibly be wrong?

Regards. 

It's impossible to tell what the problem is from the information provided, but it sounds like the image is not in the proper format. I strongly suggest using the geotiff format and check to make sure it is an integer format. Otherwise, you would have to send us the image to evaluate.