I have sent an excercise relating to the problems I have been having in layers to Andrew (CJEMicros). He'll send the document to his PD programmer to help "iron out" some of the random errors that I experience - my biggest nightmare are layers where intermittent crashes cause me to lose work. The issues I'm experiencing are as follows: Photodesk has suffered an unexpected error. OK to continue, CANCEL to quit when "Paste into new layer is clicked". Clicking OK to continue may.... 1. Display corrupted image - appears as yellow tint over the image. Starting from scratch is only solution. 2. Go into an unrecoverable loop. I have to Quit PD and reload and start again. 3. The same error often occurs when switching between layers (layer #0 or #1). At this stage even if the program allows me to continue, it fails later. 4. Sometimes when clicking on layer #0 or #1 I get a bizarre message.......... "This operation may produce unexpected results as there is no fully opaque background and the layers have different blend modes. Click OK to go ahead with the merger or Cancel to abort the operation". OK gives "Photodesk has suffered an unexpected error. OK to continue, Cancel to Quit". Clicking OK to continue sometimes lets you carry on and the error seems to be ignored by PD, at other times PD crashes and its iconbar icon disappears. 5. Occasionally when selecting and deleting (CTRL-F2) images from the clipboard PD reports an "Illegal window handle". Goes into a loop with........ "Photodesk has suffered an unexpected error. OK to continue, CANCEL to quit". I am forced to Quit PD and start again. Photodesk 3.09 RISC OS 5.13 Iyonix 512MB RAM Regards Richard