On Mon, 2 Nov 2009, Andreas Schneider wrote:

Hi,

as it seems, some symbols in math mode seem to fail when put inside MetaPost. In the example I tried, both "~" and "|" were causing processing errors when used inside MetaPost (I tried both btex...etex as well as \sometxt). It works fine in MKII however.

The minimal example is attached to this mail.

I don't know how to prevent expansion of ~ and | inside mp. Hans, can you please check what is the right way to correct this. However, note that ~ does not make sense in math mode anyways. As a work-around, you can use $a\ b\vert c$ inside metapost. Aditya