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# Cannot parse ini file "...\AppServer\AppServerX.xml". Reason: XmlDomParser. Invalid token \[..]
### Problem & Symptoms
Sometimes you may encounter the following situation after modifying the AppServer.xml file, it fails to operate properly and you can see the following message in the logs files of the **/\/WSC/AppServer/Logs** directory:
```javascript
Cannot parse ini file "...\AppServer\AppServerX.xml". Reason: XmlDomParser. Invalid token in line <00> column <00> error code 17
```
The error means that you use inappropriate symbols which are reserved characters in XML such as, for example, **>** or **<** characters in the parameter value in AppServerX.xml file. This file is located in **\/AppServer/AppServerX.xml** directory.
### Solution
To solve the issue, you need to replace the **reserved characters in XML** with their **corresponding entities** or update the parameter value so that it doesn't contain any of the reserved characters listed in the table below.
| Character | Entity |
| --------- | ------- |
| **&** | \& |
| **<** | \< |
| **>** | \> |
| **"** | \" |
| **'** | \' |
To do so:
1. [Stop AppServer](https://docs.wproofreader.com/v6.12.0/troubleshooting/server-side-backend/pages/IA2KNQLXDh85TwDivL4y#mainappservercommands-stopappserverwindowslinux2.stopappserver).
2. Open the AppServerX.xml file and navigate to the line mentioned in the error message.
3. Replace reserved characters that cause the crash of XML with their appropriate entities.
4. Save changes in the AppServerX.xml file and [Start AppServer](https://docs.wproofreader.com/v6.12.0/troubleshooting/server-side-backend/pages/IA2KNQLXDh85TwDivL4y#mainappservercommands-startappserverwindowslinux1.startappserver) to apply changes.
#### Examples for the SSLCertificatePassword parameter
**Incorrect syntax example (using < in the field):**
```javascript
1
```
**Correct syntax example (replacing < with its corresponding entity \<) :**
```javascript
1<rfgcyJ
```