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Error: An input parameter is invalid

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Hi,

I got a vi file from my friend.

When I try to open it, I got about 20 error messages, and one is like following.

 

"LabVIEW: An input parameter is invalid. For example if the input is a path, the path might contain a character not allowed by the OS such as ? or @.

The file 'DAQmx READ (Analog 1D Wfm NChan NSamp).vi' could not be loaded."

 

But I am sure that there is no character like ? and @ in the path.

Other error messages are very similar and only the film name of last sentence were changed. 

- The file 'DAQmx Creat Channel (CO-Pulse Generation-Frequency).vi' could not be loaded.

- The file 'DAQmx Timing (Implicit).vi' could not be loaded.

..... and so on.

 

What should I do in order to resolve this problem?

 

And when I open the file, I could see that many words are broken.

 

Thank you.

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Solution
Accepted by topic author kjh2677

The first thing that comes to mind is : Have you installed DAQmx?

 

Ben64

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Thank you for your answer.

Actually, I am a beginner of this field.

 

https://www.ni.com/en-us/support/downloads/drivers/download.ni-daqmx.html#325032

 

Will downloading this solve the problem?

Thank you.

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