Mike Schmitt  and   already explained different ways of debugging.

In addition, If you want to print local variable value in logs, you can try logmessage plug-in (community.appian.com/.../log-a-message).

a!localVariables(
  local!data: "Message printed by logmessage function..........",
  local!info: logmessage("ERROR", local!data),
  local!data
)

Output:

The following will be printed in tomcat-stdOut.log file:
2024-06-11 07:24:30,614 [http-nio-8080-exec-995] ERROR com.incessant.plugins.logMessageMain.LogMessage - Message printed by logmessage function..........

I hope this helps.

Mike Schmitt  and   already explained different ways of debugging.

In addition, If you want to print local variable value in logs, you can try logmessage plug-in (community.appian.com/.../log-a-message).

a!localVariables(
  local!data: "Message printed by logmessage function..........",
  local!info: logmessage("ERROR", local!data),
  local!data
)

Output:

The following will be printed in tomcat-stdOut.log file:
2024-06-11 07:24:30,614 [http-nio-8080-exec-995] ERROR com.incessant.plugins.logMessageMain.LogMessage - Message printed by logmessage function..........

I hope this helps.

Server Error in '/' Application.

Runtime Error

Description: An exception occurred while processing your request. Additionally, another exception occurred while executing the custom error page for the first exception. The request has been terminated.

Yogi Patel  - I could not access the link

The search function in the app market returned this updated link:

community.appian.com/.../log-a-message