Split from this thread . I am still having the same issues as Wendy. I have the same thing occurring/ Answering your question: Click Mailing tab>Start Mail Merge>E-mail Messages>Select Recipients>Using an Existing List>select the Excel file, click Open then OK, then the error appears? >>Yes this the exact steps i am doing usually but then recently got the error. Does the issue happen when you use a specific Excel file or all files? >>It's for all the excel files I am using as data source I click OK, then it closes. Product information: A family of Microsoft word processing software products for creating web, email, and print documents. Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question. Doug Robbins - MVP - Office Apps and Services • 323.4K Reputation points • MVP • Volunteer Moderator 2020-02-20T06:56:11+00:00 See the response that is marked as the answer in the following thread: https://answers.microsoft.com/en-us/msoffice/forum/all/error-has-occured-catastrophic-failure-when-using/76999791-648d-4910-99f2-a7aaf14b12d8?LastReply=true#LastReply Note that in Excel, it will be necessary to go to File>Options>Advanced>General and uncheck the box for “Ignore other applications that use Dynamic Data Exchange (DDE) 0 comments No comments Report See the response that is marked as the answer in the following thread: https://answers.microsoft.com/en-us/msoffice/forum/all/error-has-occured-catastrophic-failure-when-using/76999791-648d-4910-99f2-a7aaf14b12d8?LastReply=true#LastReply Note that in Excel, it will be necessary to go to File>Options>Advanced>General and uncheck the box for “Ignore other applications that use Dynamic Data Exchange (DDE) Anonymous 2020-02-18T01:26:26+00:00 What Version of Windows and Office are you using? Here with a 64-bit insallation of WIndows 10 Pro, Version 10.0.18363 Build 18363 and a 64 bit installation of Office 365 ProPlus, Version 2001 (Build 12430.20264), I do not experience the problem. Likewise on a 32-bit insallation of WIndows 10 Pro, Version 10.0.18363 Build 18362 and a 32 bit installation of Office 365 ProPlus, Version 2001 (Build 12430.20264). Nor on a computer with a 64-bit insallation of WIndows 10 Pro, Version 10.0.18363 Build 18363 and a 64 bit installation of Office Professional Plus, Version 2001 (Build 12430.20264) I do however experience the problem on the 32-bit computer when attempting to attach an Excel data source to a mail merge main document when using Microsoft Office Professional Plus 2010 Version 14.0.7237.5000 (32-bit) As I have also seen a report of the same issue with Office 2007, there does appear to have been some issues caused by a recent update to Windows 10. Try rolling back to the previous version. See https://www.howtogeek.com/235474/how-to-roll-back-builds-and-uninstall-updates-on-windows-10/ Hi, I am also having the same problem as Jon Smith above and i have tried your suggestion to uninstall the latest Windows 10 updates. The problem still cannot be solved. I am using Windows 10 and Office 2010. Anyone can help? 0 comments No comments Report What Version of Windows and Office are you using? Here with a 64-bit insallation of WIndows 10 Pro, Version 10.0.18363 Build 18363 and a 64 bit installation of Office 365 ProPlus, Version 2001 (Build 12430.20264), I do not experience the problem. Likewise on a 32-bit insallation of WIndows 10 Pro, Version 10.0.18363 Build 18362 and a 32 bit installation of Office 365 ProPlus, Version 2001 (Build 12430.20264). Nor on a computer with a 64-bit insallation of WIndows 10 Pro, Version 10.0.18363 Build 18363 and a 64 bit installation of Office Professional Plus, Version 2001 (Build 12430.20264)

I do however experience the problem on the 32-bit computer when attempting to attach an Excel data source to a mail merge main document when using Microsoft Office Professional Plus 2010 Version 14.0.7237.5000 (32-bit) As I have also seen a report of the same issue with Office 2007, there does appear to have been some issues caused by a recent update to Windows 10. Try rolling back to the previous version. See https://www.howtogeek.com/235474/how-to-roll-back-builds-and-uninstall-updates-on-windows-10/ I am also having the same problem as Jon Smith above and i have tried your suggestion to uninstall the latest Windows 10 updates. The problem still cannot be solved. I am using Windows 10 and Office 2010. Anyone can help? Doug Robbins - MVP - Office Apps and Services • 323.4K Reputation points • MVP • Volunteer Moderator 2020-02-16T21:54:46+00:00 What Version of Windows and Office are you using? Here with a 64-bit insallation of WIndows 10 Pro, Version 10.0.18363 Build 18363 and a 64 bit installation of Office 365 ProPlus, Version 2001 (Build 12430.20264), I do not experience the problem. Likewise on a 32-bit insallation of WIndows 10 Pro, Version 10.0.18363 Build 18362 and a 32 bit installation of Office 365 ProPlus, Version 2001 (Build 12430.20264). Nor on a computer with a 64-bit insallation of WIndows 10 Pro, Version 10.0.18363 Build 18363 and a 64 bit installation of Office Professional Plus, Version 2001 (Build 12430.20264) I do however experience the problem on the 32-bit computer when attempting to attach an Excel data source to a mail merge main document when using Microsoft Office Professional Plus 2010 Version 14.0.7237.5000 (32-bit) As I have also seen a report of the same issue with Office 2007, there does appear to have been some issues caused by a recent update to Windows 10. Try rolling back to the previous version. See https://www.howtogeek.com/235474/how-to-roll-back-builds-and-uninstall-updates-on-windows-10/ 0 comments No comments Report What Version of Windows and Office are you using? Here with a 64-bit insallation of WIndows 10 Pro, Version 10.0.18363 Build 18363 and a 64 bit installation of Office 365 ProPlus, Version 2001 (Build 12430.20264), I do not experience the problem. Likewise on a 32-bit insallation of WIndows 10 Pro, Version 10.0.18363 Build 18362 and a 32 bit installation of Office 365 ProPlus, Version 2001 (Build 12430.20264). Nor on a computer with a 64-bit insallation of WIndows 10 Pro, Version 10.0.18363 Build 18363 and a 64 bit installation of Office Professional Plus, Version 2001 (Build 12430.20264) I do however experience the problem on the 32-bit computer when attempting to attach an Excel data source to a mail merge main document when using Microsoft Office Professional Plus 2010 Version 14.0.7237.5000 (32-bit) As I have also seen a report of the same issue with Office 2007, there does appear to have been some issues caused by a recent update to Windows 10. Try rolling back to the previous version. See https://www.howtogeek.com/235474/how-to-roll-back-builds-and-uninstall-updates-on-windows-10/ Anonymous 2020-02-16T15:27:11+00:00 Are you using the OLE DB Database Files method of attaching the data source to the mail merge main document? What does that mean? For us non-savvy computer folks, what steps do we have to take to import an excel file and avoid the catastrophic failure hard stop? Please list steps needed to fix or work around. Thanks so much! R 0 comments No comments Report Are you using the OLE DB Database Files method of attaching the data source to the mail merge main document? What does that mean? For us non-savvy computer folks, what steps do we have to take to import an excel file and avoid the catastrophic failure hard stop? Please list steps needed to fix or work around. Thanks so much! Doug Robbins - MVP - Office Apps and Services • 323.4K Reputation points • MVP • Volunteer Moderator 2020-02-13T22:29:34+00:00 Are you using the OLE DB Database Files method of attaching the data source to the mail merge main document? 0 comments No comments Report Are you using the OLE DB Database Files method of attaching the data source to the mail merge main document?