There are a number of different ways to renumber nodes and elements in cmiss. 

* ** In the backend I know of 2 options which are:**

  * 1) Use the CMISS utilities module 'RenumIp':

    <pre>
use CmUtils::RenumIp;
renumIp("fitted_arm_6.ipnode",30,"fitted_arm_6.ipelem",30);
    </pre>

       **POTENTIAL PROBLEM** - if your mesh has versions, the nodes pertaining to your version numbers in your ipelem file will not be offset correctly


  * 2) This option uses a function within cmiss:

    <pre>
fem renumber mesh node_offset 10 element_offset 10 region 1;
    </pre>

       **POTENTIAL PROBLEM** - if your mesh has versions, the nodes pertaining to your version numbers in your ipelem file will be incorrectly set to zero


* ** In the frontend:**

  * To ensure version numbers are offset correctly in the ipelem file, you can renumber the nodes and elements in CMGUI (the frontend) using the [gfx change_identifier] command, then export them to backend files using the command:

    <pre> 
gfx export cm region name field coordinates ipcoor name.ipcoor ipbase name.ipbase ipnode name.ipnode ipelem name.ipelem;
    </pre>

  * This command is very useful! It will output your exnode and exelem into ipnode and ipelem files, at the same time it will output a coordinate and basis file. Note however that you cannot output only node and element files, you need to output coordinate & basis files for the command to work.