When using the Copy Files task in SAS Enterprise Guide to upload a large file from the local workstation to a SAS Viya file system, the upload operation can fail with the following error:

ERROR: Upload exception occurred. An error occurred while updating the content.

This issue occurs because the file transfer exceeds the default REST request time-out that SAS Enterprise Guide uses. In some environments, additional server-side upload limits can also prevent large file transfers from completing successfully.

The Copy Files task uploads files to the SAS Viya file system using a REST request. For large files, the transfer can exceed the default 100-second REST request time-out, causing the upload to fail even though the file transfer is still in progress.

To support large file uploads to a SAS Viya file system, complete the following steps:

1. Upgrade to SAS^® Enterprise Guide^® 8.6 Hot Fix 5.
   
   
2. Add the new Viya_RestRequestTimeoutSeconds option to the SEGuide.exe.config file.
   

   Insert the following entry within the <appSettings> section:
   
   <appSettings>
    <add key="Viya_RestRequestTimeoutSeconds" value="600" />
   </appSettings>
   

   The value is expressed in seconds and can be increased if additional time is required for larger file transfers.
   
   Note: This option is recognized only in SAS Enterprise Guide 8.6 Hot Fix 5 (and later).

3. If the SAS Viya deployment enforces upload-size or request-timeout limits, update the appropriate SAS Viya server settings. Depending on the deployment architecture and network configuration, administrators might also need to increase server-side upload limits and request timeouts. 
   
   
   A SAS Viya administrator can review and adjust the following SAS Viya settings:
   • proxy-body-size is configured on the SAS Viya ingress or proxy layer and controls the maximum size of an upload request that is accepted by the server.
   • SAS_CLIENT_TIMEOUT_REQUEST is a SAS Viya environment variable that controls how long client upload requests are allowed to run before timing out.
   
   The values required in a specific environment can vary based on file size, network throughput and deployment configuration.
   
   Note: On some OpenShift deployments, increasing Viya_RestRequestTimeoutSeconds alone might be sufficient and no server-side changes might be required. The required configuration depends on the specific environment.