Excel 2016 no more fonts

Hi MarcoBonciolini,

Thank you for posting your concern in the Community Forum. Glad to be of help. When I tried to replicate the issue using Excel version 1908 (build 11929.20562 Click-to-Run), I’m unable to get the same results as yours.

Could you please verify is the issue only occurring in a specific file? If so, we can possibly conclude that this is a file related concern. Therefore, we suggest that you repair the Excel file and check if the issue will be resolved. Here's the link for your reference on how to do this accordingly. If the problem persists, recreating the file is the last option that we can advise. 

If this concern is also occurring in other Excel files, we can say the problem is with the application itself. Therefore, we suggest that you perform all primary troubleshooting steps to resolve this concern. Please follow each method below and get back to us with the results: 

Method 1: Install Office Update. 

1. Open Excel. 
2. Click on File. 
3. Go to Account. 
4. Under Product Information, choose Update Options and click Update Now. 
5. Once the updates completely installed, relaunch Excel and see if the problem occurs. 

Method 2: Open Excel in safe mode.

1. Press the Windows and R key on your keyboard simultaneously. 
2. In the Run command, type excel /safe (include space between excel and / symbol) and then click OK. 
3. Once the Excel app opens in safe mode, observe the issue if it is persisting. 

If the issue doesn’t occur while in Safe Mode, then an add-in is likely causing it. To disable add-ins, please access this link and follow the steps under Permanently disable or remove an add-in. 

Note: To stop Office Safe Mode, just exit and restart your Excel application. 

Method 3: Repair Office program.

1. Right-click the Start button (lower-left corner). 
2. Select Apps and Features. 
3. Right-click the Microsoft Office program and select Change and then choose Online Repair. 
4. Click Repair and follow the on-screen instruction to continue. Restart your computer and check if the concern is still occurring. 

Method 4: Uninstall and Reinstall Office program.

Uninstall Office from a PC

Download and install or reinstall Office 365/Office 2016 or Office 2019 on a PC or Mac

Please let us know the results by replying to this thread, and we will get back to you as soon as we can.

Hello, thanks for your feedback.

I'd like to debug it, if a create a new excel file or if i open one of my file, i have no issue.

I know that these problems are related to these xlsx files.

I work with 16 excel files together, every file is linked to another one and some file have almost 100 workbooks.

Anyway i am within the limits of Microsoft ( https://support.office.com/en-us/article/excel-specifications-and-limits-1672b34d-7043-467e-8e27-269d656771c3 )

There is a Tool or an official method to find corrupt cell, i really don't know why i have these problem, i can't work anymore, sometime when i open my files appear that error, even if i just click on a cell.

Thank you for clarifying that the issue is related to your XLSX files. Therefore, repairing the workbook or recreating it as what we previously suggested is the only option that we can advise. Also, have you tried following the methods that we initially provided? By doing so, it will refresh the program and resolve any underlying issues within the Excel application that can possibly fix this concern.

Please reply to this thread to let me know how the issue progresses. Similarly, if you have more questions, please inform me by replying to this post.

Thank you.
What do you mean with "repairing the workbook" ? How can i do that?
Now i'm creating new XLSX, i copy each workbook from old one and save with same name (i need to use SAME name because many formulas..) 

I hope it will fix.

The issue should be fixed once you have recreated your XLSX file. What I intended for repairing the workbook is if the data is corrupted, we can recover it by performing a repair. Here’s the article for the steps on how to do this accordingly. 

Please let us know the results by replying to this thread, and we will get back to you as soon as we can.

Ok, i finish the test and it doesn't work yet.

I recreate every xlsx file with every workbook, i copied only cells with data from old workbook to new one and go on.
Now i see that the problem is related to a number of opened excel files maybe...

If i open ALL my 16 files together (like always i do), even if i create a new blank document and i type a formula like =31+21 appear the error!
If i close some files and i create a new blank document i can work..  Maybe Excel counts the number of fonts from all opened files??

Thank you for getting back to us, Marco. I agree with you that the problem might be related to a number of open Excel files. This issue might also be related to computer performance itself.

Therefore, we are looking forward to involving our higher level of support in doing a more thorough investigation of the issue and for me to get accurate information for this concern. Therefore, we’d like to have the following information to do a proper escalation:

Type of Device:

OS Name, Build, and version of the Device:

Excel build and version:

Additionally, we have sent you a private message to gather another information to do the proper escalation. To get into your inbox, click your profile name on this thread and select View private messages.

We’ll keep an eye out for your response.

Hello Genevieve, 

i'm working on a Computer Top Gamma of Microsoft.

Surface Studio 2, i7-7820HQ, 32gb ram, 1tb ssd, gtx 1070 8gb.
Windows 10 latest build

Excel Version 2001 (Build 12430.20288)

Thank you for that information, Marco. I also sent you a private message to gather additional information to do a proper escalation. To get into your inbox, click your profile name on this thread and select View private messages. 

We’ll be looking forward to your reply.