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Nuno_Santos's avatar
Nuno_Santos
Advocate I
1 year ago
Solved

An unexpected error occurred (file '', line , function '')

After updating to the May 2025 Report Server, the error 'An unexpected error occurred (file '', line , function '')' is occurring in reports that had been deployed for a long time. It appears that t...
"Power BI Report Server May 2025”
  • Nuno_Santos's avatar
    Nuno_Santos
    1 year ago

    Hi,

    After installing on several devices and noticing that some returned errors while others didn’t, I compared the system information of each one and found that the issue, in this case, is related to AVX CPU extension support. One of the VMs didn’t inherit this extension from the host, and once it was enabled, the error disappeared.

    We can conclude that the error is related to CPUs lacking the AVX extension.
    Best Regards.

Anonymous's avatar
Anonymous
Not applicable
1 year ago

Hi Nuno_Santos ,
We are following up once again regarding your query. Could you please confirm if the issue has been resolved through the support ticket with Microsoft?
If the issue has been resolved, we kindly request you to share the resolution or key insights here to help others in the community. 

Thank you for your understanding and participation.

Nuno_Santos's avatar
Nuno_Santos
Advocate I
1 year ago

Hi, still working on it.

 

I have run some tests and minimized the data to reproduce the error with a CSV file, created in a plain text file.
 
The text file contains only these lines:
A,B
1845,330679
1845,330679
1845,330679
1845,330679
1845,330679
1845,330679
1845,330679
1845,330679
 
the 3 steps applied to file load:
= Csv.Document(File.Contents("D:\work\TestFile.csv"),[Delimiter=",", Columns=2, Encoding=65001, QuoteStyle=QuoteStyle.None])
= Table.PromoteHeaders(Source, [PromoteAllScalars=true])
= Table.TransformColumnTypes(#"Promoted Headers",{{"A", type number}, {"B", Int64.Type}})
 
column A was set as a decimal and column B as a whole number.
 
I created the measure:
measure= CALCULATE(COUNT(TestFile[B]),TestFile[A]>0)
 
and a visual list with only one column containing the created measure and the error occurs.
 
the error disappears if I do one of the following:
  • remove at least one line of the file (all lines are equal)
  • change column A type from decimal to whole number
  • change measure removing TestFile[A]>0, or changing to TestFile[A]=0 or TestFile[A]<0, but TestFile[A]>=0 the error remains (the '>'  operator is causing the error)

Thanks.

  • Anonymous's avatar
    Anonymous
    Not applicable
    1 year ago

    Hi Nuno_Santos ,
    Thank you for keeping us updated on the issue and confirming that it’s still unresolved. Once you hear back from the support team, please do share the response here, it will be helpful for others who may encounter a similar issue.
    Thank you.

    • Nuno_Santos's avatar
      Nuno_Santos
      Advocate I
      1 year ago

      Hi,

      After installing on several devices and noticing that some returned errors while others didn’t, I compared the system information of each one and found that the issue, in this case, is related to AVX CPU extension support. One of the VMs didn’t inherit this extension from the host, and once it was enabled, the error disappeared.

      We can conclude that the error is related to CPUs lacking the AVX extension.
      Best Regards.

      • Anonymous's avatar
        Anonymous
        Not applicable
        1 year ago

        Hi Nuno_Santos ,
        Thank you for the update — glad to hear the issue has been resolved!
        Please consider accepting your answer as the solution so others facing a similar issue can easily find it.

        Regards,
        Pallavi.

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