R1. Machine-dependent constants R2. Error checking R3. Error handling R1. Machine-dependent constants I1MACH-I Return integer machine dependent constants. R1MACH-S Return floating point machine dependent constants. D1MACH-D R2. Error checking (e.g., check monotonicity) GAMLIM-S Compute the minimum and maximum bounds for the argument in DGAMLM-D the Gamma function. R3. Error handling FDUMP-A Symbolic dump (should be locally written). R3A. Set criteria for fatal errors XSETF-A Set the error control flag. R3B. Set unit number for error messages XSETUA-A Set logical unit numbers (up to 5) to which error messages are to be sent. XSETUN-A Set output file to which error messages are to be sent. R3C. Other utility programs NUMXER-I Return the most recent error number. XERCLR-A Reset current error number to zero. XERDMP-A Print the error tables and then clear them. XERMAX-A Set maximum number of times any error message is to be printed. XERMSG-A Process error messages for SLATEC and other libraries. XGETF-A Return the current value of the error control flag. XGETUA-A Return unit number(s) to which error messages are being sent. XGETUN-A Return the (first) output file to which error messages are being sent.