alogsmall   = 21, { ALOG arg negative or zero}
 sqrtneg     = 18, { SQRT arg negative}
 explarge    = 19, { EXP arg greater than 174.6731}
 expsmall    = 20, { EXP arg less than -180.2182, not used}
 sinlarge    = 26, { SIN arg magnitude greater than 5.274e7}
 asinlarge   = 29, { ASIN arg magnitude greater than 1.0}
 coslarge    = 27, { COS arg magnitude greater than 5.274e7}
 acoslarge   = 30, { ACOS arg magnitude greater than 1.0}
 tanlarge    = 28, { TAN/COTAN arg magnitude greater than 2.633e7}
 cotansmall  = 41, { COTAN arg small in magnitude}
 arctan2zero = 31, { ATAN2 args zero}
 sinhlarge   = 32, { SINH arg magnitude greater than 175.3662 }
 coshlarge   = 33, { COSH arg magnitude greater than 175.3662 }
 powerneg    = 23, { Negative REAL value raised to a non-integer power}
 powerzero   = 22, { REAL zero raised to non-positive power   }
 powerbig    = 24, { REAL value raised to too large REAL power }
 powersmall  = 25, { REAL value to REAL power underflows. not used}
 gamlarge    = 42, { GAMMA arg magnitude greater than 57.0}
 gamnegint   = 43, { GAMMA arg near zero or negative integer}
 lgamneg     = 44, { ALGAMA arg is negative}
 lgamlarge   = 45  { ALGAMA arg is greater than 4.29e73}