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Get an asynchronous message – either data or error from VES buffer. The VES message pipe is 64 messages long. When the pipe is full, any printing to the pipe is blocked. To avoid blocking the command line and other tasks (in some cases the printings are sent to all the system pipes), the VES message pipe is flushed when the pipe is full.
Return value: Data or Error message. Data has prefix “D:”, while error response has prefix “E:”
<string var name> = VESMessage
Since Version 3.7.x
Only from task context