What to Do with Runtime Error 91

Runtime error 91 is a common problem which shows when you try and use a problem that has some sort of damaged / inconsistent code inside. The error will typically show with this message: "Object Variable or With Block Variable Not Set", and specifically relates to the way in which your computer will be unable to read certain pieces of data which your computer needs to run. To fix this problem, you should first look at any application errors your computer may have, and then repair any of the potential problems with the settings on your system.


This error is caused by the way in which your computer cannot correctly read the "variables" that your software uses to run. Variables are an important part of any software, as they allow "variable" pieces of data to be transferred around your programs and hold information such as your password and username. The error you're seeing is basically telling you that there are a number of problems with the variables that your system is trying to use - making it vital you fix them as quickly as possible.
This error will show in this format:

• "Runtime Error 91: Object variable or with block variable not set"

The first step to fix the runtime 91 error is to clean the permissions of your PC by using the "DCOMCnfg.exe" program. This is basically a central Windows application which enables your user-account to protect various parts / files of your PC by limiting access to them. It could be the case that this has blocked access to the various files your software requires to run, making it vital you sort this issue. To do this, load up the DCOMCnfg.exe program and then make sure its permissions are set for "Everyone".
After that you should then clean out the "Registry" of your computer. The registry is a central database which stores vital settings and information for your PC. It's basically where Windows keeps a huge number of important pieces of information that your computer can then read whenever it wants. Although the registry is one of the most important parts of your PC, it's also one of the biggest causes of problems - and is what leads many Runtime Errors to show. If you find that the DCOMCnfg.exe file is okay, then you should use a "registry cleaner" tool to fix any potential problems that might be inside the registry database of your system.