Open Source Document Management System | OpenKM

Getting below exception when we do OpenKM search via WS call, But we don't face any issues via OpenKM UI. Do we need to configure charset or something else to resolve this issue. Please help me.

org.xml.sax.SAXParseException: An invalid XML character (Unicode: 0x1) was found in the element content of the document

Please note that we are using SDK to connect OpenKM.

First of all, write here a minimal sample of your code, and also the catalina.log error