#  Troubleshooting 

 



## K2K not working

If you run CEM for SPSS with the K2K option and you get matched treatment and control groups that are different sizes, try to update CEM to the latest version using the following command in SPSS:

BEGIN PROGAM R.install.packages("cem", repos = "[http://cran.rstudio.com](http://cran.rstudio.com/)", type = "source")END PROGRAM.
## "No package called 'cem'

If you try to run CEM for SPSS and you receive the error message: `library(cem): there is no package called 'cem'`, then do the following:

1. Open the version of R associated with your version of SPSS (see above) and type the following line while connect to the internet and press Enter:
    
    `install.packages("cem")`
2. You should be presented with a list of mirrors from which to choose. Pick the mirror closest to your current location. R should proceed to download and install the relevant files.
3. To ensure that the installation worked, type the following and press Enter:
    
    `library(cem)`

If you receive no error messages, then CEM should be properly installed and you can now run CEM in SPSS.

## Permissions

There can often be issues with permissions on Windows systems when attempting to install CEM for SPSS. To fix this problem, you need to setup a local, user-specific directory for the CEM extension.

### Windows 7

1. Create a folder called `SPSS-extensions` in your **My Documents** folder. Inside of this folder, create another folder called `dialog`.
2. Open the **Start Menu** and type **Accounts** in the Start Search field. Under Control Panel, select **User Accounts**
3. Click on the **Change my environmental variables** option on the left-hand panel of the newly opened window.
4. Add the following user variables by clicking on the top-most **New...** button. Use the following variable names and values:
    
    
    - **Variable:** `PYTHONPATH` **Value:** `%USERPROFILE%\Documents\SPSS-extensions`
    - **Variable:** `SPSS_EXTENSIONS_PATH` **Value:** `%USERPROFILE%\Documents\SPSS-extensions`
    - **Variable:** `SPSS_CDIALOGS_PATH` **Value:** `%USERPROFILE%\Documents\SPSS-extensions\dialog`
    
    After adding all of these, hit the **OK** button.
5. Close any open instances of SPSS. Start SPSS and install the `cem.spe` file from the **Utilities > Extension Bundles > Install Extension Bundle...** menu item. You should see a dialog box that says "Extension bundle successfully installed." Restart SPSS and try to use CEM again.

### Windows Vista

1. Create a folder called `SPSS-extensions` in your **My Documents** folder. Inside of this folder, create another folder called `dialog`.
2. Open the Start Menu and type **Accounts** in the Start Search field. Under programs, select *User Accounts*.
3. In the User Accounts window, under *Tasks*, select *Change my environment variables*.
4. Add the following "User variables" by clicking on the top-most **New...** button. Use the following variable names and values:
    
    
    - **Variable:** `PYTHONPATH` **Value:** `%USERPROFILE%\Documents\SPSS-extensions`
    - **Variable:** `SPSS_EXTENSIONS_PATH` **Value:** `%USERPROFILE%\Documents\SPSS-extensions`
    - **Variable:** `SPSS_CDIALOGS_PATH` **Value:** `%USERPROFILE%\Documents\SPSS-extensions\dialog`
    
    After adding all of these, hit the **OK** button.
5. Close any open instances of SPSS. Start SPSS and install the `cem.spe` file from the **Utilities > Extension Bundles > Install Extension Bundle...** menu item. You should see a dialog box that says "Extension bundle successfully installed." Restart SPSS and try to use CEM again.

### Windows XP

1. Create a folder called `SPSS-extensions` in your **My Documents** folder. Inside of this folder, create another folder called `dialog`.
2. From the Start Menu, right-click **My Computer** and select **Properties**. Click the **Advanced** tab.
3. Click the **Environmental Variables** button.
4. Add the following "User variables" by clicking on the top-most **New...** button. Use the following variable names and values:
    
    
    - **Variable:** `PYTHONPATH` **Value:** `%USERPROFILE%\My Documents\SPSS-extensions`
    - **Variable:** `SPSS_EXTENSIONS_PATH` **Value:** `%USERPROFILE%\My Documents\SPSS-extensions`
    - **Variable:** `SPSS_CDIALOGS_PATH` **Value:** `%USERPROFILE%\My Documents\SPSS-extensions\dialog`
    
    After adding all of these, hit the **OK** button.
5. Close any open instances of SPSS. Start SPSS and install the `cem.spe` file from the **Utilities > Extension Bundles > Install Extension Bundle...** menu item. You should see a dialog box that says "Extension bundle successfully installed." Restart SPSS and try to use CEM again.