Error getting Serialized Project Loader

Hi,

I have configured a deployment manager using RMI Server. DM is running as spring boot app and connected to MSSQL repo. When I change a rule from IDE, DM is able to pick the changes.

I have another spring boot app with Rule server which starts without any error. This also gets registered to DM. When I am calling my API to invoke the rule getting below error. My BOM is already implemented Serialized interface.

Error getting Serialized Project Loader

Error unmarshaling return; nested exception is: 

java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: com.blazesoft.template.repository.objects.bom.NdPromExternalBomContentImpl

java.io.NotSerializableException: com.blazesoft.template.repository.objects.bom.NdPromExternalBomContentImpl

at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1185)

at java.base/java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1379)

at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1175)

at java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1553)

at java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1510)

at java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1433)

I followed the documents exactly same for DM and Rule Server configurations.

Thanks.