→Known bugs, problems and workarounds: MarCCD frames not being displayed
# ''Question concerning TOOLS: "Show frame..." on Mac: it creates everything shown in the commandline but it seem to us that everything runs in the background. Therefore xds-viewer does not open anywhere as it is not seen. Also, it would be great if this image together with the predictions would be re-directed to the FRAME tab.'' <br> Answer: On Linux, the xds-viewer window is brought to the foreground automatically, whereas on the Mac this does not seem to happen. However, an icon for xds-viewer appears in the dock (on the right) and I can double-click it to see the xds-viewer window. I have no idea how to bring xds-viewer to the foreground automatically, and I need input from people who know Macs and tell me how to do it. The reason why we do not open automatically in the FRAME tab is that one can have several xds-viewer windows open at the same time, and compare the patterns. As a '''workaround''', you can manually open the resulting temp/FRAME_$X.cbf in the FRAME tab.
# ''Another question concerning TOOLS: "Further analyses" on Mac: again pointless runs nicely but there is no output for the user.'' <br> Answer: Could it be that you started xdsgui by double-clicking its icon in the Finder? In that case, there is no output visible, because there is no console. Unfortunately, for all the Tools, the output is in the console window where xdsgui was started. Thus, you should really start xdsgui in a console window.
# both generate_XDS.INP and [[XDS]] do not
seem to like spaces ("blanks") in file/directory names. While frame names rarely have a space in them, directories might, e.g. if an external disk has the label "John's USB disk" then this would be mounted on Linux as /media/John's USB disk/ and that would result in a error message from generate_XDS.INP and/or XDS. The '''workaround''' is to use a symlink on a different hard disk.
# ''Problem description: On the Mac, after loading frames, by clicking “generate XDS.INP”, the program gives some strange symbol “Ã” in XDS.INP. And the more you click “save” button, the more “Ã” appeared. This looks like <br>SPACE_GROUP_NUMBER=0 Ã ! 0 if unknown <br>UNIT_CELL_CONSTANTS= 70 80 90 90 90 90 Ã .''<br> The problem is due to the “Rich text” format in TextEdit when saving "generate_XDS.INP". It is solved by re-downloading the script, and changing format to Plain - everything is working now.
# on a Mac, you may find a stream of the following error messages in the console window: <code>Jan 31 14:35:17 xdsgui <Error>: Error: this application, or a library it uses, has passed an invalid numeric value (NaN, or not-a-number) to CoreGraphics API and this value is being ignored. Please fix this problem. Jan 31 14:35:17 xdsgui <Error>: If you want to see the backtrace, please set CG_NUMERICS_SHOW_BACKTRACE environmental variable.</code> This sounds terrible, but is actually harmless. Since it is a message from Qt (which XDSGUI uses for graphics), ''it does not compromise the XDS data processing in any way''.
Just suppress the printout of these messages, by <code>xdsgui 2>&1 | egrep -v 'CoreGraphics|CG_NUMERICS'</code>
If you find a bug, please send email to Kay dot Diederichs at uni-konstanz dot de , with enough information/data to reproduce the bug.