Knowledge Base

Article ID: 492 | Category: Scanning | Type: Hot Fix | Last Modified: 1/30/2017

The parameter is incorrect / Cannot open TWAIN source


One of the following error message appears during scanning: "Cannot open TWAIN source" or "The parameter is incorrect."


Follow the instructions below to fix this problem:

  1. Start ABBYY FineReader.
  2. Open the Tools menu and select the Options item.
  3. Select the Scan/Open tab.
  4. The Driver drop-down list should contain several scanner drivers. Try scanning an image using each one of them. Finding a scanner driver that successfully produces a scanned image without causing an error solves the problem. 

If all of the scanner drivers produce errors, use the TWAIN_32 Twacker application to check if your scanner's drivers are working properly.

  1. Exit ABBYY FineReader.
  2. Download
  3. Unpack the archive you've just downloaded and install the Twacker application by double-clicking Twack_32.exe.
  4. Open the File menu in TWAIN_32 Twacker and select the Acquire item.
  5. Click the Scan button in the dialog that appears.
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