<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div><div>On Jul 8, 2012, at 10:05 PM, Richard Seguin wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; ">I get the error message<br><br>\reserved@b ->\relax<span class="Apple-converted-space"> </span><br> \ifmmode \else \non@alpherr \mathbb \fi \use@mathgroup...<br>l.11 $\mathbb{F}<br><br>I had \boldsymbol within a macro and no where else. (That particular macro was created years ago.) I removed it, and now instead of producing an error on a \mathbb within the first few pages, the LaTeX compiler processes probably hundreds of \mathbb before stopping on a \mathbb on page 67 with a similar error message.<br></span></blockquote></div><br><div><br></div><div>Adding the line</div><div><br></div><div>\usepackage{bm}</div><div><br></div><div>at the end of the font-loading macros makes that message go away in the cases where \boldsymbol provokes the error. Whether it helps anything else is questionable.</div><div><br></div><div>Michael</div></body></html>