Question:
I have received a server error which says Value cannot be null. Parameter name: stream. What do I do?
Answer:
This error is caused when the IIS node cannot persist state to the file system. For single node deployments, check if the drive on the IIS system is full. Or corrupt.
With multiple IIS nodes, the nodes may share a common file store. See the Members tab in ICTool, specifically the PDS and FDS path values.
- Verify the drive is still accessible at the specified path
- Check if the drive is full or corrupt
- Have your IT department reboot the VM with the shared drive.
- Reboot the IIS node that cannot access the file share.
KBA-01881; Last updated: August 19, 2025 at 16:25 pm