Get error msg: A copy of Firefox is already open. Only one copy of Firefox can be open at a time.

Get the following msg. when I try to open Firefox: " Close Firefox. A copy of Firefox is already open. Only one copy of Firefox can be open at a time." No other copy is installed or running.
== This happened ==
Every time Firefox opened
== After I reloaded a new copy of OS X. Previous system folder was archived.

I got this message after trying to copy my profile folder over to a new computer
This worked for me:
make sure hidden files can be seen
go to (user)/Library/Application Support/Firefox
find profiles.ini
open it with textedit and make sure the default profile is the same folder you have under Firefox/Profiles
good luck!

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When I click on the icon to open Firefox I get an error message " A copy of Firefox is already open, only one copy of Firefox can be open at a time".

I have tried to download and run Firefox on my MAC OS 10.6.7 several times and have run into this error message every time:
"A copy of Firefox is already open. Only one copy of Firefox can be open at a time". A search through the computer does not fine another copy of Firefox and there is no window open or evidence of the program open.
When I got this computer a year ago I copied the hard drive from the old computer onto the new and the old computer had a copy of Firefox on it and the program worked on that computer. It would not run on the new computer so I thought maybe it was due to the Intel chip so I deleted the program and downloaded the newest version at the time. This is when I started getting the error message and subsequent attempts have yielded the same results.
Can you be of help?

See:
* https://support.mozilla.com/kb/Firefox+is+already+running+but+is+not+responding

Error on Mac- A copy of firefox is already open. only one copy of firefox can be open at a time.

error message on mac - a copy of firefox is already open. Only one copy of firefox can be open at a time.

This worked, I used the method described in this link http://forums.mozillazine.org/viewtopic.php?t=365156, and opened the Mozilla profile screen with the terminal on my mac, using the language given in the links. Then I duplicated my original profile to save the bookmarks, etc. Put them in a folder listed Duplicate profile with the date. With the open profile screen, I deleted my original profile, created new profile folder and then a new profile. Note that profile cannot be created in the system library, it must be created on the disc, because the library will not allow writing into it. After I created my new profile folder, I dragged all my old information into it, and it worked. Firefox closed and the error disappeared. You must be VERY careful to make sure Firefox is closed anytime you are doing anything with the profile folders. I think that is what caused my original problem.

I get error msg 0x00000015 when trying to install driver for scanner of PIXMA MP140. Can anyone plea

Solved!
Go to Solution.

Hello sturrdave.
To resolve this error, please try downloading and installing the latest drivers from our website at this link.
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Msg 116, Level 16, State 1, Line 6 Only one expression can be specified in the select list when the subquery is not introduced with EXISTS.

Hello,
Can anyone help me?
select year(po.rdata) as 'Ano',
sum(etotal) as 'Valorp' ,
(select year(fo.data),Sum(etotal)
FROM fo (nolock)
where not exists ( select 1 from pl (nolock) where pl.adoc = fo.adoc and pl.cm = fo.doccode )
group by year(fo.data))as 'Valorap'
from po
group by year(po.rdata)
order by year(po.rdata)
Error
Msg 116, Level 16, State 1, Line 6
Only one expression can be specified in the select list when the subquery is not introduced with EXISTS.
Consultora

Hi Prashanth,
select year(po.rdata) as 'Ano',
sum(etotal) as 'Valorp' ,
(select Sum(etotal)
FROM fo (nolock)
where not exists ( select 1 from pl (nolock) where pl.adoc = fo.adoc and pl.cm = fo.doccode )
group by year(fo.data))as 'Valorap'
from po(nolock)
group by year(po.rdata)
order by year(po.rdata)
Gives me the error:
Msg 512, Level 16, State 1, Line 1
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
Thanks
Consultora

I have tried uninstalling and reinstalling Firefox several times. Every time I try to open Firefox I get an error message saying "Close Firefox"," A copy of Firefox is already open. Only one copy of Firefox can be open at a time."

I uninstall Firefox, then reinstall Firefox, try to open Firefox, and get an error message in a popup box saying,
"Close Firefox"
"A copy of Firefox is already open. Only one copy of Firefox can be open at a time."

Create a new profile as a test to check if your current profile is causing the problems.
See "Basic Troubleshooting: Make a new profile":
*https://support.mozilla.com/kb/Basic+Troubleshooting#w_8-make-a-new-profile
If that new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.
See:
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

When I try and launch Firefox, I get this error message A copy of Firefox is already open. Only one copy of Firefox can be open at a time." and have tried all of the trouble shooting tips, can you help?

When I try and launch Firefox, I get this error message >A copy of Firefox is already open. Only one copy of Firefox can be open at a time." and have tried all of the trouble shooting tips, can you help? I thought if I were to completely uninstall and re install it might help, but I cannot seem to find instructions to do this....

See [[Firefox is already running but is not responding]], the image shown in that article is the Windows equivalent of the error message that you are receiving, but the information relates to the Mac.

I am getting an error message that "A copy of Firefox is already open. Only one copy of Firefox can be open at a time" and I don't have any copy open.

I am getting an error message that "A copy of Firefox is already open. Only one copy of Firefox can be open at a time" and I don't have any copy open. How do I correct this problem? I really like firefox because it runs many technical programs on the web that do not work with safari. I have FireFox version 32.0.1 installed on my MacPro PowerBook OS X 10.7.5. My activity monitor does not show any FireFox activity, so do not know what it is seeing

This worked, I used the method described in this link http://forums.mozillazine.org/viewtopic.php?t=365156, and opened the Mozilla profile screen with the terminal on my mac, using the language given in the links. Then I duplicated my original profile to save the bookmarks, etc. Put them in a folder listed Duplicate profile with the date. With the open profile screen, I deleted my original profile, created new profile folder and then a new profile. Note that profile cannot be created in the system library, it must be created on the disc, because the library will not allow writing into it. After I created my new profile folder, I dragged all my old information into it, and it worked. Firefox closed and the error disappeared. You must be VERY careful to make sure Firefox is closed anytime you are doing anything with the profile folders. I think that is what caused my original problem.

When I try to open firefox I get the error message "A copy of Firefox is already open. Only one copy of Firefox can be open at a time," I don't have any firefox things running.

I had the problem of firefox just not starting at all before, so I deleted my profile. Now I just get the message "A copy of Firefox is already open. Only one copy of Firefox can be open at a time." But I checked my activity monitor and there are no processes operating under firefox, what do I do?

See http://kb.mozillazine.org/Profile_in_use

Why, when I open Firefox 4, do I keep having Firefox 3 pop up continually and having the error message "A copy of Firefox is already open. Only one copy of Firefox can be open at a time." ?

Every time that I try to use Firefox 4, Firefox 3 pops up on the Dock and tries to start up. I get the error message "A copy of Firefox is already open. Only one copy of Firefox can be open at a time." I click OK and the message goes away. Then it happens again. And again. It doesn't stop until I quit Firefox 4. I've tried creating a new profile (and deleting my old one) and deleting the .parentlock and the profile.ini file, but nothing works. Help me please!

See:
* https://support.mozilla.com/kb/Firefox+is+already+running+but+is+not+responding

A copy of Firefox is already open. Only one copy of Firefox can be open at a time. I GET THIS MESSAGE - BUT FIREFOX APPEARS NOT TO BE OPEN.????????

i have already deleted (trashed) all versions of firefox, and then re-downloaded the new Firefox, and when i try to open it, i get the message, "A copy of Firefox is already open. Only one copy of Firefox can be open at a time."

Make sure you allow Firefox a few minutes to close down,and always use the menu options to close Firefox (Not just closing a window or killing the process).
Just for now Look for Firefox processes or plugin container that are still running and kill them before trying again.
* see [["Firefox is already running but is not responding" error message - How to fix it]]
** and also [[Firefox hangs or is not responding - How to fix]] <br />& http://kb.mozillazine.org/Firefox_hangs#Multiple_sessionstore.js_files

Bought new Mac Retina; how do I get CS 5 on it; bought external hard drive but get error msg 15?

Bought new Mac Retina; how do I get CS 5 on it; bought external hard drive but get error msg 15?

Hi there,
I was able to format the Toshiba hard drive on my old Mac and copy the Adobe Suite onto it. I followed instructions to format the hard drive to the Retina Mac through Disk Utility, but I still can see the external drive on the new Mac.
Any suggestions…?
Susan Babin

Unable to open firefox - get message that " a copy is already open and only one copy can be open at a time. I have dragged the app to the waste basket and downloaded another firefox app. However same result". I have a IMAC , V.10.6.3.

Unable to open firefox - get message that " a copy is already open and only one copy can be open at a time. I have dragged the app to the waste basket and downloaded another firefox app. However same result". I have a IMAC , V.10.6.3.
I get above message when I click on the firefox icon.

This worked, I used the method described in this link http://forums.mozillazine.org/viewtopic.php?t=365156, and opened the Mozilla profile screen with the terminal on my mac, using the language given in the links. Then I duplicated my original profile to save the bookmarks, etc. Put them in a folder listed Duplicate profile with the date. With the open profile screen, I deleted my original profile, created new profile folder and then a new profile. Note that profile cannot be created in the system library, it must be created on the disc, because the library will not allow writing into it. After I created my new profile folder, I dragged all my old information into it, and it worked. Firefox closed and the error disappeared. You must be VERY careful to make sure Firefox is closed anytime you are doing anything with the profile folders. I think that is what caused my original problem.

ITunes no longer works on my Windows VISTA system. Get error msg saying C runtime library incorrectly... Error 7, Windows error 1114..

iTunes no longer works on my Windows VISTA system. Get error msg saying an application is attempting to access C runtime library incorrectly... Error 7, Windows error 1114. Same msg, or one that says unable to install, when trying to update or reinstall iTunes. iTunes worked well up until about a month ago when this error msg starting appearing.

Go to Control Panel > Add or Remove Programs (Win XP) or Programs and Features (later)
Remove all of these items in the following order:
iTunes
Apple Software Update
Apple Mobile Device Support (if this won't uninstall move on to the next item)
Bonjour
Apple Application Support
Reboot, download iTunes, then reinstall, either using an account with administrative rights, or right-clicking the downloaded installer and selecting Run as Administrator.
The uninstall and reinstall process will preserve your iTunes library and settings, but ideally you would back up the library and your other important personal documents and data on a regular basis. See this user tip for a suggested technique.
Please note:
Some users may need to follow all the steps in whichever of the following support documents applies to their system. These include some additional manual file and folder deletions not mentioned above.
HT1925: Removing and Reinstalling iTunes for Windows XP
HT1923: Removing and reinstalling iTunes for Windows Vista, Windows 7, or Windows 8
tt2

When I try to open Firefox 3.6 (Mac) by clicking on the icon, I get this message: "Close Firefox: A copy of Firefox is already open. Only one copy of Firefox can be open at a time." I've removed older versions and restarted, but still get this message. Wh

I've just downloaded Firefox 3.6 (Mac). When I attempt to open, this message pops up: "Close Firefox: A copy of Firefox is already open. Only one copy of Firefox can be open at a time." I've removed older versions and restarted, but still get this message. What's going on?
== This happened ==
Every time Firefox opened
== after I downloaded the latest version. ==
== User Agent ==
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_3; en-us) AppleWebKit/531.22.7 (KHTML, like Gecko) Version/4.0.5 Safari/531.22.7

You might find your solution in [http://kb.mozillazine.org/Profile_in_use this article].

Get error msg: A copy of Firefox is already open. Only one copy of Firefox can be open at a time.

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