Using the Spreadsheet node to (successfully) write out SQL query results to a spreadsheet. The result is visible in the node and can be downloaded from the execution view as a valid XLSX file. However, subsequent nodes cannot see this file, even though I have saved to a path that has a persistent volume on the host. When I look within the running container, I also cannot find the file. When I look at the persistent (mapped) volume directory on the host, there is no file. I have tried using a filename both with an explicit, absolute path and without (as in the version pasted here). Same result - not found.
I’ve read as many posts on file output that I can find in the forum. I am OK with docker volumes etc. and have tried several (my Postgres instance is persisted to the host for example) yet I just cannot find this file inside or outside of the container. The n8n.log file is persisted and contains no messages relating to this (n8n_LOG_LEVEL is set to warn).
Screenshot attached below
It feels like I am missing something fundamentally simple … Stuck ! 
Any and all advice very welcome.
Error message : “Read Binary File: The file “mdmtasks.xlsx” could not be found”
Output returned by the last node
NodeOperationError: The file "mdmtasks.xlsx" could not be found.
at Object.execute (/usr/local/lib/node_modules/n8n/node_modules/n8n-nodes-base/dist/nodes/ReadBinaryFile/ReadBinaryFile.node.js:58:31)
at async Workflow.runNode (/usr/local/lib/node_modules/n8n/node_modules/n8n-workflow/dist/src/Workflow.js:594:28)
at async /usr/local/lib/node_modules/n8n/node_modules/n8n-core/dist/src/WorkflowExecute.js:537:49
n8n setup:
- n8n version: 0.181.2
- Database you’re using (default: SQLite): PostgreSQL as a container
- Running n8n with the execution process [own(default), main]: ?own
- Running n8n via [Docker, npm, n8n.cloud, desktop app]: **docker **
