Added a workaround for caQtDM binaries missing from RHEL9

3-Add-simulated-motors.md

@@ -229,6 +229,20 @@ Do the following:
 $ ./softioc/xxx.sh caqtdm
 ```
 
+If the `EPICS_HOST_ARCH` is `rhel9-x86_64` and caQtDM is not found, then do the following:
+<details>
+<summary>workaround</summary>
+
+bash
+```
+$ sed -i.bak -e 's/APSshare\/bin\/caQtDM/APSshare\/caqtdm\/caqtdm-4.4.0-APS\/caQtDM_Binaries\/rhel9-x86_64\/caQtDM/g' ../../start_caQtDM_xxx
+```
+And then restart caqtdm:
+```bash
+$ ./softioc/xxx.sh caqtdm
+```
+</details>
+
 This launches **my-xxx.ui**:
 
 ![screenshot of my-xxx.ui showing the default Motors section](images/my-xxx-motors.png)