It is not a BLIde issue, This window just outputs the text provided by the BMK utility, when the BMK utility ends providing a errorlevel different from 0, so this error and text is provided by BMK.
Have you compiled all the mods (including MaxIDE) using an update MinGW or compiled mods other than MaxGui without the updated MinGW? Delete your pub and brl mods folder, syn modules, restart BLIde updating modules, and it whould work again. this message error is usually reported by window when an application ends in a unusual way, that seem a bmk issue. When using Vista, be sure to have dissabled the User Account Control, and to be running BLIde and BlitzMax from an administrative account, otherwise you can spect all kind of strange bugs on Vista.
Ah, and try your code in the regular IDE and provide feedback, please.
@MichaelB:
blitz3dsdk.dll in line 1600 (or byte: 543273)
or
B3D.dll - nearly same byte (533478)
Where did you get this info?