[GRASS-user] r.mapcalc: Syntax Error?

[Rich Shepard]

   GRASS reports a syntax error running r.mapcalc that I do not see:

GRASS 6.5.svn (Washington-Kinross):~/grassdata > r.mapcalc "weight =
if(tan_curv_5.lm < 0, -100 * tan_curv_5.lm, \
if(tan_curv_7.lm < 0, -100 * tan_curv_7.lm, \
if(tan_curv_11.lm < 0, -100 * tan_curv_11.lm, 0.000001)))"
syntax error, unexpected ';'
Parse error
[Raster MASK present]

   Since there is no semi-colon in the command, what is grass trying to tell
me?

Rich