[TYPO3-english] TYPO3 6.2.x: GraphicsMagic GIFBUILDER TIF (CMYK) to jpg, gif or png produces white image

[Bert Hiddink [BENDOO e-work solutions]]

Hello,

The following snippet works fine in case of a jpg as source file but 
produces a white image in case of a tif source file (for both CMYK and 
RGB version):

...
   30 = IMAGE
   30 {
     wrap=<div class="col-md-3 col-lg-3 col-sm-3"><div 
class="block-empty afbeelding">|</div></div>
     file = GIFBUILDER
     file {
       XY = 240,240
       format = jpg
       quality = 100
       10 = IMAGE
       10.file = fileadmin/user_upload/images/test.jpg #Works fine
       #produces white image
#      10.file = fileadmin/user_upload/images/tif/7_001rgb.tif #
       #produces white image
  #     10.file = fileadmin/user_upload/images/tif/7_001.tif
      }
   }
...

Using GM on TYPO3 6.2.x

Any idea where this could come from? Should/can I specificy a specific 
color profile when rendering?

Any suggestions?

Thanks in advance!

Regards,
Bert