Error writing to export file; export has been terminated" in Sage 50
Sage 50 could not finish writing the exported data to disk, so it stopped the export partway through rather than produce a bad file.
You were exporting data out of Sage 50, and partway through the process it stopped with the message:
Error writing to export file; export has been terminated.
Despite the wording, this is usually not a problem with your accounting data. It means Sage 50 tried to write a chunk of the export to the output file on disk and the write failed. Rather than leave you with a truncated or corrupt file, it aborted the export. The data in your company file is normally untouched; only the export output is incomplete or missing.
Why the write fails
The causes fall into a few groups. The destination disk may be full, or you may lack permission to write to that folder. A network drop can interrupt a write to a mapped drive. The target file may already exist and be locked, perhaps open in Excel or held by a sync service such as OneDrive or Dropbox. Finally, damage inside the company file can make Sage 50 emit a record it cannot format, which surfaces as a write error even though the real fault is upstream.
Check the destination first
Start with the simplest possibilities. Export to a local folder you know you can write to, such as your Documents directory. Make sure the drive has ample free space, since exports of large histories can be bigger than expected. If the output file already exists, delete it or choose a new name. Close any program that might have the file open, and pause cloud-sync tools while exporting.
Retry with a smaller export
If the full export keeps failing, narrow the scope. Export a shorter date range, a single journal, or one account at a time. This does two things. It gets your data out in pieces if you are in a hurry, and it tells you whether the failure is environmental or data-specific. If every small export succeeds but the full one dies at the same point each time, the fault is likely a damaged record in the company file.
When the company file itself is the problem
Repeated failures at the same spot, or exports that fail no matter where you write them, point to damage inside the Sage 50 data. That is not something an export setting can fix. Our engineers repair damaged Sage 50 and Simply Accounting databases directly, and we can also handle the export for you once the file is sound. If your end goal is moving the data into QuickBooks, see our Sage 50 to QuickBooks conversion service; for Canadian editions, our Simply Accounting to QuickBooks conversion covers the same ground.
A useful next step
Run one small export to a local folder. If it succeeds, work outward in larger chunks until the export fails again; the size and scope of that failing chunk tells you a great deal. If even a tiny export fails, or the failure always lands in the same place, send us the file for a free evaluation. We will tell you what is wrong and what a repair or conversion involves, with no obligation.