Code::Blocks reports another instance running, even when there isn't one

Question

When I try running Code::Blocks, I get the following error message:

Another program instance is already running. Code::Blocks is currently configured to only allow one running instance.

You can access this Setting under the menu item 'Environment'.

I had a similar problem before with e.g. Google Chrome when I didn't shut it down correctly, but for Chrome, I managed to locate the lock file, delete it, and it solves the problem.

For Code::Blocks, I looked around and tried several proposed solutions, but none of them worked:

• look for the process (ps -A | grep 'codeblocks') and kill the process

  I found a stray process this way, but killing it did not help.

• allow multiple instances Setting under 'Environment' menu

  I can not run any instance in the first place, so can not access the menu.

  I tried running Code::Blocks from terminal with codeblocks --multiple-instances but that parameter must have been abandoned some time ago, as it is no longer recognized.

• I looked all over for some kind of a lock file, to try and delete it

  Unfortunately, I didn't find anything that looked to me distinctly like the lock file :(

Answer 1

Uh, sorry everybody, looks like I have this annoying habit of finding a solution within minutes of complaining about the problem, instead in my "look for solution" phase.

I found the lock file to delete and fix the problem: deleting /tmp/Code::Blocks-username fixes the problem.

Some further solutions are outlined in the Code::Blocks official forums, including how to change the settings from "allow single instance" to "allow multiple instance" without actually running Code::Blocks.