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First of all, you need to make sure that you have installed Java Runtime Environment (JRE) or Java Development Kit 8+, as both of them contain a Java Virtual Machine (JVM) that is required to run Java programs. The new grammar engine is written on in Java.

2. Stop AppServer

Before any changes in the AppServer configuration file (AppServerX.xml), stop AppServer.

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• Find a section with parameters responsible for the configuration of Java Virtual Machine (JVM) that are required for the grammar engine: <PathToJavaVirtualMachine>...</PathToJavaVirtualMachine>

<!-- At least java 8 is required to use langtool grammar engine. In case of empty tag AppServer tries to detect path to jvm library automatically. -->
<!-- You can put path to jvm library here. Path example for Linux: /usr/lib/jvm/java-8-oracle/jre/lib/amd64/server/libjvm.so. -->
<!-- Path example for Windows: C:/Program Files/Java/jre1.8.0_121/bin/server/jvm.dll -->
<PathToJavaVirtualMachine></PathToJavaVirtualMachine>
<!-- Put maximum heap size restriction in megabytes for langtool in java virtual machine. -->
<JVMMaxMemorySizeMb>256</JVMMaxMemorySizeMb>

• Use the PathToJavaVirtualMachine parameter to specify a correct path to a JVM on your server.

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1. Check the status: 

   Excerpt Include
   IN:_include_wsc54x_status_check_response IN:_include_wsc54x_status_check_response nopanel true

2. Go to the Demo Sample pages (http(s)://your_host_name:port/wscservice/samples) that shipped with the WebSpellChecker Server package and choose any of demo samples with enabled Grammar.
3. Additionally, go to logs (e.g. Child Child-0.log or Child-1.log) files located in AppServer/Logs folder and check if there are any errors appear after you specified path to your JVM. Here is an example of errors that are thrown by AppServer if a path to JVM is JVM is not found.

MM/DD/YY:HH:MM:50.821	#18794:0	Subsystem_General	Error	Could not find path to jvm.dll. At least java 8 is required to use grammar engine. You can specify path to jvm library in AppServerX.xml in 'PathToJavaVirtualMachine' tag.
MM/DD/YY:HH:MM:50.821	#18794:0	Subsystem_General	Error	Function execution error (name:check_grammar1, result:-1, params:check_grammar1
test message
-1
en_US
)

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