Export to Excel: Error when open file

[Jan]

Hello Telerik,
When export to excel is executed Excel file report error:

The file you are trying to open, 'SomeFile.xls' , is in a different format than specified by the file extension. Verify that the file is not corrupted and is from a trusted source before opening the file. Do you wabt to open the file now? Yes, No, Help

When yes is clicked file is opened.

[Vlad]

Hi,

You can use ExcelML type and save the file with xml extension. 

Best wishes,
Vlad
the Telerik team

[Jan]

Hi Vlad,

Customer wants xls file, no xml.

Best regards

[Vlad]

Hello,

 This file even with XML extension will still be associated with MS Excel. 

Best wishes,
Vlad
the Telerik team

[Jan]

Hi Vlad, 
I can understand that, but the clients are adamant it has to be xls. Can you give me any information if you plan to do anything about the xls format in the future?
Thanks for your help. 

[Veselin Vasilev]

Hi DCMS,

This troubleshooting article has more information.

Regards,
Veselin Vasilev
the Telerik team