Hi Trish,

 

We’re sorry you’re seeing that error. It comes from the R rgdal package, which is being used to read the prediction rasters into memory. Obviously the message is not very helpful so we’ll have to do some detective work to figure out what is happening.

 

Early versions of the tool could fail by running out of memory because they tried to read the entire raster into memory at once. This usually resulted in a different error and that problem has been fixed since MGET 0.6 or so. Most likely it is not a memory issue.

 

Some suggestions to try:

 

1.    Verify that ArcGIS itself can read the raster by previewing it with ArcCatalog. Most likely you have already done this.

 

2.    Reduce the extent of the prediction region by providing a smaller template raster. The offset number is very large, suggesting your prediction raster is very large. The tool should work on any size raster providing that rgdal can read it, but maybe you are hitting a limit and rgdal is not reporting a clear message.

 

3.    Enable verbose logging, reproduce the problem, and email me the entire output from the geoprocessing window and I’ll see if I can spot anything. There are instructions for enabling verbose logging here:

 

http://code.env.duke.edu/projects/mget/wiki/Configuring%20MGET%20logging

 

Best regards,

 

Jason

 

 

Hello-

I was running "predict GLM from rasters"  and during the prediction phase received the following error: RPy_RException: Error:  GDAL Error 1: Read of 4098 bytes from offset 114063832 for grid block failed.

Any idea what this means and how to prevent it?

Thanks,
Trish

Trish Miller
GIS Lab Manager
Carnegie Museum of Natural History
Powdermill Nature Reserve
1847 Route 381
Rector, PA 15677
724.593.4856


www.powdermill.org

PhD Candidate
Intercollege Graduate Degree Program in Ecology
Riparia (formerly Cooperative Wetlands Center)
The Pennsylvania State University
University Park, PA


724.216.3770