MOPEN: too many files open

Last Published: April 26, 2020

Error Message

This error occurs when copying themes from one view to another:

"MOPEN: too many files open."


Your system resources are low.

Solution or Workaround

Increase the number of file descriptors in the cshell.
Log in as System administrator and type the following at the OS prompt:

A. To view the hard limit for file descriptors:
limit -h
B. To view number of file descriptors:
C. Now set a number of descriptors that doesn't exceed the hard limit:
limit descriptors <number>
Use the System requests GetFileDescriptorLimit and SetFileDescriptorLimit if using Avenue.

Article ID:000002548

  • Legacy Products

Receive notifications and find solutions for new or common issues

Get summarized answers and video solutions from our new AI chatbot.

Download the Esri Support App

Discover more on this topic

Get help from ArcGIS experts

Contact technical support

Download the Esri Support App

Go to download options