column width can be set only relative

[Andre König]

The columnwidth in the \column{width} command can be set only relative to the poster width (\textwidht?). That means \column{0.33} works, but \column{15cm} not (see log below). According the documentation absolute lengths should be OK, too.

Log: ! Package calc Error: `\TP@visibletextwidth ' invalid at this point. See the calc package documentation for explanation. Type H <return> for immediate help. ...
l.95 \column{15cm} ! Missing number, treated as zero.