This file contains the MATH table which allows stretchy glyphs. The data in this file is in the .ttx format and instead of glyph indicies, it uses glyph names which FontLab does not currently support. Therefore, edit this file for the MATH data corresponding to the current FontLab .vfc master. Then export the FontLab master to .otf format. Use ttx logix.otf to convert logix.otf to logix.ttx. Then insert the remainder of this file starting at the tag just before the tag in the logix.ttx file. Then delete logix.otf and use ttx logix.ttx to recreate it with the MATH table included. Open the new logix.otf in FontLab and click on the "tables" button (bottom right buttom). Copy the generated MATH table to a temporary buffer. Close logix.otf and open logix.vfc and import the MATH table from the temporary buffer. Make sure it is set for export (click button to immediate left of MATH in the list of tables). Then export all of the various formats. =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=