ERROR: Assembly REF must be 'hg17' or 'hg18\'
ERROR: Can't open DDF file \'$ddfFile\'
ERROR: Can't open PIF file \'$pifFile\'
ERROR: Can't open RA file \'$fieldConfigFile\'
ERROR: Cell line \'$val\' is not known
ERROR: DDF Header is missing required field \'$field\' 
ERROR: Dataset \'$dataset\' has differing \'$ddfHeader[$i]\' values
ERROR: Dataset \'$dataset\' part \'$part\' has multiple files
ERROR: Dataset missing part \'$part\'
ERROR: File '\$file\' failed bed validation.
ERROR: File '\$file\' failed wiggle validation.
ERROR: File \'$file\' does not exist
ERROR: File \'$file\' is empty
ERROR: File \'$file\' is not readable 
ERROR: Header \'$field\' is unknown 
ERROR: Missing $type before $line
ERROR: Part must be 0-100
ERROR: Tracks not defined for project \'$pif{'project'}\'
ERROR: Project \'$pif{'project'}\' not yet active
ERROR: Project not defined 
ERROR: Data format \'$format\' in PIF file is unknown