BUG: can't anymore open my PB file because of this message:The start date or end date in Calen func

[Anonymous]

Hi,

I worked on my desktop with a PB file and never had any problem. Last time I worked with this file I had no problem and since nothing changed. Now I can't open the file at all and I receive this message: 

The start date or end date in Calendar function can not be Blank value. The current operation was cancelled because another operation in the transaction failed.

Thanks for your help!

[v-qiuyu-msft]

Hi @Anonymous, 

Please run the latest Power BI desktop version 2.78.5740.1101 then click on File -> Open to see if you are able to open the report. 

Best Regards,
Qiuyun Yu

[Anonymous]

Hi Qiuyun,

Thanks for your help. I dowloaded already the latest version and a colleague tried olso former verions but we can't open the file. It seems to me that there is a bug. Here I found a message to an issue that seems close to mine, it looks that the problem is related to this Failed to save modifications to the server:

https://community.powerbi.com/t5/Desktop/Power-BI-desktop-don-t-open-Failed-to-save-modifications-to...

I want to send you the outputs/files (see image bellow) that can help you to investigate but I can't join files to this message, it there a way to send you this files?  Thanks to help because the PB file represents months of devlopment and It'used by my business. I have other versions/files of the same work but none of them opens, same problem. My files for other projects work fine.

Sincerely