AutoGen: UNKNOWN

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### 3.6.18 UNKNOWN - Either a user macro or a value name.

The macro text has started with a name not known to AutoGen. If, at run time, it turns out to be the name of a defined macro, then that macro is invoked. If it is not, then it is a conditional expression that is evaluated only if the name is defined at the time the macro is invoked.

You may not specify `UNKNOWN` explicitly.

This document was generated by Bruce Korb on October 24, 2004 using texi2html