error 13 in matalb r2025b

error 13

[Torsten]

MATLAB Error 13

isn't a single error but can mean different things, most commonly a Licensing Issue (missing SERVER/USE_SERVER lines in license file) or File Permissions/Access (like "Permission denied (13)" when writing files). Other times, it points to specific coding mistakes on Line 13, such as type mismatches, incorrect array indexing (using non-positive integers), or issues with device drivers (audio, etc.).

Here's how to troubleshoot it:

1. Licensing Error (Most Common for "Error 13")

• Symptom: "A licensing error occurred...".
• Fix: Your license file (license.dat) is missing SERVER and USE_SERVER lines. Contact your admin to get the correct file or manually add these lines and restart the license manager.

2. File Permissions/Access

• Symptom: "Permission denied (13)" when creating or writing files (e.g., netCDF).
• Fix: Ensure you have read/execute permissions on the installation files and the directory where you're trying to save data. Disable antivirus temporarily if needed.

3. Code-Specific Errors (Line 13)

• Symptom: Errors like "Error using exampleUtils.componentExamplesDir (line 13)" or "Run-time error '13': Type mismatch".
• Fixes:
• Type Mismatch: The variable type isn't what the function expects (e.g., Variant() array needs indexing).
• Invalid Index: Using non-positive integers or wrong array dimensions on line 13.
• Device Error: Related to audio or hardware; try restarting MATLAB or checking audiodevinfo.

4. Installation Errors

• Symptom: "exec error 13" during installation.
• Fix: Check file permissions and disable antivirus.

General Steps:

• Check the Full Error Message: Look for keywords like "Licensing," "Permission," "Type Mismatch," or specific function names.
• Use Code Analyzer: Right-click the highlighted code in MATLAB and apply suggested fixes.