Added hidden preference to suppress the opencamlib error

src/Mod/Path/InitGui.py

@@ -129,7 +129,8 @@ class PathWorkbench (Workbench):
                 threedcmdgroup = ['Path_3dTools']
                 FreeCADGui.addCommand('Path_3dTools', PathCommandGroup(threedopcmdlist, QtCore.QT_TRANSLATE_NOOP("Path", '3D Operations')))
             except ImportError:
-                FreeCAD.Console.PrintError("OpenCamLib is not working!\n")
+                if not PathPreferences.suppressOpenCamLibWarning():
+                    FreeCAD.Console.PrintError("OpenCamLib is not working!\n")
 
         self.appendToolbar(QtCore.QT_TRANSLATE_NOOP("Path", "Project Setup"), projcmdlist)
         self.appendToolbar(QtCore.QT_TRANSLATE_NOOP("Path", "Tool Commands"), toolcmdlist)

src/Mod/Path/PathScripts/PathPreferences.py

@@ -58,7 +58,8 @@ GeometryTolerance           = "GeometryTolerance"
 LibAreaCurveAccuracy        = "LibAreaCurveAccuarcy"
 
 WarningSuppressRapidSpeeds  = "WarningSuppressRapidSpeeds"
-WarningSuppressSelectionMode  = "WarningSuppressSelectionMode"
+WarningSuppressSelectionMode = "WarningSuppressSelectionMode"
+WarningSuppressOpenCamLib   = "WarningSuppressOpenCamLib"
 EnableExperimentalFeatures  = "EnableExperimentalFeatures"
 
 
@@ -267,6 +268,9 @@ def suppressRapidSpeedsWarning():
 def suppressSelectionModeWarning():
     return preferences().GetBool(WarningSuppressSelectionMode, False)
 
+def suppressOpenCamLibWarning():
+    return preferences().GetBool(WarningSuppressOpenCamLib, False)
+
 
 def lastFileToolLibrary():
     filename = preferences().GetString(LastFileToolLibrary)