Invalid Argument Provided

What does E_INVALIDARG mean?

An invalid argument was supplied to the function. For OpenConfiguration(), the bstrFile path does not refer to a valid TwinCAT configuration file. For SaveConfiguration(), the bstrFile path is invalid for saving. For LinkVariables(), the offs1, offs2, or size parameters do not match the variables' structure or range.

• A parameter value is outside its defined acceptable range (e.g., P1-54 > 100).
• An incorrect data type was provided for a configuration setting.
• A command was issued with missing or malformed arguments.

Click steps to track your progress.

1. 1

   For OpenConfiguration() and SaveConfiguration(): Verify the bstrFile parameter points to an existing, valid .wsm configuration file or a valid, writable output path, respectively.

2. 2

   For LinkVariables(): Inspect offs1, offs2, and size values to ensure they are within the logical bounds and bit/byte alignment of the target variables.

3. 3

   Check for any illegal characters, incorrect syntax, or inaccessible locations in file paths or parameter values.