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Pete, Computer Expert
Category: Microsoft Office
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Experience:  MS Office expert
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when I try & open an existing excel it comes up with...problem

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when I try & open an existing excel it comes up with...problem sending command to program

ITPeter :

Hello, I am Pete, and I'll be happy to assist with your question today.

ITPeter :

There are a number of reasons why this error may occur.

ITPeter :

Try the following:

Open Excel, then go to Options, select Advanced and then scroll down to the "General" section. Make sure that "Ignore other applications that use

Dynamic Data Exchange (DDE)" is not checked.

Customer: replied 4 years ago.
I have tried that & it was already unchecked??
What version of Excel and windows are you using?
What is the file extension of the problem files?
Customer: replied 4 years ago.
office 2007 & windows 7 dont know what you mean by file extension?

Hi David,


The file extension is the end part of the file name, e.g. .xls or .xlsx


This problem may be the result of a corrupt registry entry.


To fix this automatically, go to the following website and under More Information, click 'Fix It':




Customer: replied 4 years ago.
i have tried this but still have the same excel issue the site you directed me to was talking of word not excel
Do you have any other versions of Excel installed on the computer?
Have you recently upgraded Excel or made any other changes around the time the problem started?
What happens if you create a new spreadsheet, save it, close it and open it again?
Are only older spreadsheets affected, or are all spreadsheets affected?
Customer: replied 4 years ago.
i dont have any other versions installed
and havent upgraded

its just stopped working

if i open a new excel sheet & save to desktop I cant open that either?

still says "problem sending command to program??
Hi David,

Can you try the following 'Fix It' for this problem.

If it still doesn't work, let me know the file extension of the problem files (e.g. .xls, .xlsx)
Hi David,

I'm just following up on this -
did the 'Fix It' work?

Customer: replied 4 years ago.
I have tried
and that didnt resolve the issue??? some files end in xls & others alsx when i try and open the file and it says it problem sending command to program IF i click out of it and have a grey screen and click on the "office button all the files are listed there & they open from that location???
Right-click on one of the files and select Open With... and then select Excel 2007.
Let me know if this allows the file to open normally.
Customer: replied 4 years ago.
in right clicking it only gives option of microsoft excel NOT 2007???
If you only have one version of Excel installed, then select MS Excel.
Customer: replied 4 years ago.
I did but it still wont open
Ok, then I think we have checked all possibilities, and the next step is to restore the system to a previous date, before the problem first started occurring.

To perform system restore, close all programs, then open System Restore by clicking the Start button and typing System Restore in the Search box. Then, in the list of results, click System Restore.  If you're prompted for an administrator password XXXXX confirmation, type the password XXXXX provide confirmation.
Follow the steps in the wizard to choose a restore point and restore your computer.
Pete, Computer Expert
Category: Microsoft Office
Satisfied Customers: 15211
Experience: MS Office expert
Pete and 2 other Microsoft Office Specialists are ready to help you
Customer: replied 4 years ago.
I have loaded some software for work IF I do a system restore will I lose this software? The issue I have was prior to this software so its not that that is causing issue?

Hi David,


You may need to reload the software if it was installed after the system restore date that you select. You can always undo the restore if the effects are undesired.





Customer: replied 4 years ago.

i have looked at system restore & have done this many times in the past BUT....all the restore points check points are NOT there???


This will be the only way forward for you if Excel continues to have the undesired effects, apart from entirely reinstalling Windows.


System Restore only restores critical system files and some program files and registry settings. It does not affect personal files, such as e-mail, documents, or photos, so you don't need to worry about losing anything important.



Customer: replied 4 years ago.
I know how to do system restore BUT all previous restore pointe etc are NOT showing as have always done before..just system image points but they date back ages.........dont know where system restore points have gone to
If your hard disk or the partition where the restore points are saved is running out of space, Windows will automatically delete restore points to free up some space.

Does restoring to the 3 month old restore point resolve the Excel problem for you?

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