Error: type mismatch in param_parser.nim(110, 39)
compiled using the command 
nim c \NimScan-master\NimScan.nim
with the latest nim compiler (1.6.4)
and got the error:

NimScan-master\modules\param_parser.nim(110, 39) Error: type mismatch: got <string, string>
but expected one of:
proc calc_range(subnet: string): seq[string]
  first type mismatch at position: 2
  extra argument given
1 other mismatching symbols have been suppressed; compile with --showAllMismatches:on to see them

expression: calc_range(range1, range2)