"Always ready to help" list members, Sunday I desperately asked for help... **************************************************** ...does someone successfully run FB^3 compiled applications on a 68030 Mac? Programs compiled (RegisterVars On) with the UltraLite Runtime (Release 3 or 4) crash on my SE/30 (OS 7.5.5). MacsBug indicates that the problem is in the runtime code (either core or Incl.). **************************************************** Monday after having received helpful feedback from some of you: "No problems running FB^3 programs on such historic machines"... **************************************************** After some more tests without success I shall have a closer look at missing or defect system extensions on my 68030 machine. I shall report on my efforts. **************************************************** Now it's tuesday and I've resolved my problem -- a beginners error! My apologies to everybody! The Apple Menu Resource had a MDEF number of 63 instead of 0 (must be something like 42). This error didn't show up till I tried to run my programs on my old but speedy (50MHz) SE/30 -- funny (now!). Interestingly, Macsbug showed some part of the FB^3 core runtime. BTW, I have run the FB^3/Release 4 editor and compiler on this SE/30 and everything worked near to perfect. The binary display made it a bit cumbersome to select code in the editor but the function was perfect and all my code compiled as usual: Bravo Andy and Chris! The sole minor shortcoming was, I could not open the Preferences from the Editor... Most important: My programs now seamlessly runs on the SE/30. Many thanks Herbie ************************** H.Glu@...