Load panel tui file not working on CVI2012 for Linux

Question

We are having problems with panels that look fine on Windows being difficult to read on Linux, presumably because most control and text fonts are VAL_DIALOG_META_FONT on Windows but the CVI for Linux run-time only has NISYSTEM.
As a quick way to test different fonts on Linux I created a tui file from the uir file and then used global search and replace to change VAL_DIALOG_META_FONT to something that would hopefully look decent on Linux.
Problem is that LoadPanel(0,"filename.tui",1) works on WIndows but throws error -46 on Linux.
Whereas LoadPanel,0,"filename.uir,PANEL) works fine on Linux & Windows but the fonts are very hard to read on Linux.
Is there a table somewhere mapping the VAL_FONT attribute magic numbers to corresponding fonts on Windows and Linux?
It'd be nice to have some guidance on the default font mappings. But at the end of the day, I don't really care much about fonts unless the defaults are hard to read.
I guess one other potential complication is the UIR file originally came from CVI 8.5, but CVI 2010 for Windows didn't say anything about needing to "convert" it.  Perhaps one of the attributes in the tui file is not valid on Linux, but is on Windows?
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Answer 1

Loading TUI files in Linux it's an issue that we have recently discovered and it did not made it yet to the known issue list. I'm not 100% sure but I believe a workaround to that problem would be to go and manually edit that tui file and remove those attributes that generates errors. You can begin with  ATTR_TITLEBAR_STYLE and then look if one of the following are in the tui file: ATTR_DS_BIND_PLOT_STYLE, ATTR_DS_BIND_POINT_STYLE, ATTR_DS_BIND_LINE_STYLE, ATTR_DS_BIND_PLOT_COLOR and delete them. Then try to load the tui file again.
On the other hand I think there is a workaround for your original problem: the predefined fonts (VAL_DIALOG_METAFONT) looks bad on Linux. I believe there is a way a user can change the underlying font and the size of a predefined font. In windows you can change it in the registry but in Linux you can define an environment variable: XAPPLRESDIR that points to a directory that should contain a file named cvi, a file where you can write font settings. Each line has to be of the following format: <appName>.<key>:<value>. If you want the settings you're writing to be persistent for all applications the put a "*"instead of the application name. 
The list of possible key is: appFont (NIAppMetaFont), menuFont (NIMenuMetaFont), dialogFont (NIDialogMetaFont), e​ditorFont (NIEditorMetaFont), messageBoxFont (NIMe​ssageBoxMetaFont).
The value have to be of the following form: <font family>-<font name>-<font size>
Here is the only line I have in the cvi file: *.dialogFont : adobe-helvetica-19