Hello Mark, Welcome to the Model T community and thank you for contributing software for everyone to enjoy.
Did you double-check the output from your Jewish Holy Days program on your Model T? David is correct about variables being limited to two letters. I wrote a little script to search through Model T BASIC files for variables that won’t work and came up with this for HDAYS.TXT AC: ACTD, ACXTD AG: AGM, AGTD AL: ALPLUS, ALTD, ALXD AM: AMD, AMD1, AMD2 BC: BCXTH, BCYTH BL: BLTH, BLXH BM: BMH, BMH1, BMH2 CC: CCTV, CCXTP CL: CLTP, CLXP CM: CMP1, CMP2 MM: MM, MM2 Given so many overlapping variables, it seems highly unlikely HDAYS could possibly work as it is. Would you like help with fixing it or do you know enough programming to be able to do it yourself? This might be a good opportunity for you to try out the text editor, which is arguably the Model T’s pre-eminent feature, and see how folks handled search and replace back in those antediluvian days when giants roamed the earth. —b9 P.S. Also, please let us know if your code was AI generated. On Thu, May 28, 2026 at 10:42 AM David Plass [email protected] <https://mailto:[email protected]> wrote: Mark, in HDays.txt, there are some lines like "LET AMD2 = AMD1". Note that > Tandy 100 BASIC (like Commodore 64 BASIC) only looks at the first two > characters in BASIC identifier names, so AMD2=AMD1 is a no-op. This may > cause bugs/errors in the calculations. >
