Where are the error keys that are used in the smart service exception defined?..

From the Eclipse's perspective the <smartServiceKey>.properties has to be under the src/main/resources source folder inside a package of type <pluginKey>.

Once you export it, from the JAR's perpective, if using the Appian Plug-in Eclipse Creator add-on, it will end up under <JAR>\\<pluginKey>

The generic file has to be named <smartServiceKey>.properties but you can also have one per language: <smartServiceKey>_en_US.properties, <smartServiceKey>_en_GB.properties, etc.

Here's how it looks like: ttps://forum.appian.com/suite/doc/79237

From the Eclipse's perspective the <smartServiceKey>.properties has to be under the src/main/resources source folder inside a package of type <pluginKey>.

Once you export it, from the JAR's perpective, if using the Appian Plug-in Eclipse Creator add-on, it will end up under <JAR>\\<pluginKey>

The generic file has to be named <smartServiceKey>.properties but you can also have one per language: <smartServiceKey>_en_US.properties, <smartServiceKey>_en_GB.properties, etc.

Here's how it looks like: ttps://forum.appian.com/suite/doc/79237