Thankyou Martin B Editing texmf.cnf seems to have solved my problem (only limited testing so far – but thought I should acknowledge your work).
And Martin Luethi, you were on to it, but I forgot Therion users had control of memory availability, and in any case, I would not have known quite which parameters to change. Very happy Bruce From: Therion <[email protected]> On Behalf Of Martin Budaj Sent: Thursday, 21 May 2026 05:29 To: List for Therion users <[email protected]> Subject: Re: [Therion] th_formdef.tex runaway text error Hi, after testing Bruce's dataset, it seems TeX really runs out of memory in this case. You can increase it in the file texmf/web2c/texmf.cnf Set extra_mem_top = 4000000 % originally 2000000 in the embedded TeX distribution in Therion for Windows I also updated this in the Windows installer: https://github.com/therion/therion/actions/runs/25989238617 Martin
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