Hi Allin and all, While I was doing some scripting, I found another repeatable crash. This is my stripped down version from a more developed script: # crash test list y = l_price list x = bedrooms age baths strings xnames = defarray("const") + varnames(x) ols y const x --robust --quiet scalar i = 1 string xname = xnames[i] scalar coeff = $coeff(xname) scalar coeff = $coeff(xnames[i]) Here is the output before the last line: scalar coeff = $coeff(xnames[i]) gretl version 2020c-git Current session: 2020-05-24 16:10 ? list y = l_price Replaced list y ? list x = bedrooms age baths Replaced list x ? strings xnames = defarray("const") + varnames(x) ? ols y const x --robust --quiet ? scalar i = 1 Generated scalar i = 1 ? string xname = xnames[i] Generated string xname ? scalar coeff = $coeff(xname) Replaced scalar coeff = 10.0438 It is the last line "scalar coeff = $coeff(xnames[i])” that caused the crash. Here is the crash report: