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Error handling: How to propagate sensible error message?

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Hi, In my zul file I have such code: The problem is, that when getAllPreposes() throws sensible RuntimeException with e.g. "DB connection problem" message, zk anyway shows me "Error reading 'allPrepos' on type com.cisco.prepos.PreposViewModel at [jndi:/localhost/zul/layout/pre_pos.zul, line:11]" but not the actuall reason... How can I propagate sensable error message? Or at least full stacktrace. Thanks! ALF

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