# 
    if {[llength $::argv] >= 3} then { 
      set version [lindex $::argv 2] 
 
      if {[isEagle] && ![string is version -strict $version]} then { 
        set pattern {^\d+\.\d+\.\d+\.\d+$} 
        set pattern {^\d+\.\d+(?:\.\d+){0,2}$} 
 
        error [appendArgs \ 
            "version must match regular expression: " $pattern] 
      } 
    } else {