The macro names for external macros in a drawing must be identical to the names in the external database file or table.
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To be able to use an external macro source, you need to establish a connection to the macro source in the Define External Macro Source dialog.
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In your target drawing blocks or symbols, you need to add the E_ prefix to the name of the macro that you want to use to retrieve data from the external macro source.
For example, if a drawing contains an external macro named PROCESS which is used to retrieve the string Flow, the macro label must be written as E_PROCESS. This means that after generation, every occurrence of the label E_PROCESS in the drawing will be replaced with the value Flow.