Hello,

I used the following command to reshape data from wide to long (example of the data below).

Code:
ds cg_* ce_* local varlist = ustrregexra("`r(varlist)'","^(cg|ce)_","@_") reshape long `varlist', i(pidp) j(_j) string replace _j = cond(_j=="ce","September 2020","January 2021")

However, when I run this command I get the following error: "variable 0_welsh implied name too long". I tried to delete this variable (because it was not relevanr) but when I run the command again appears the same error with other variables. Can you help me to solve this?
Thank you in advance.

Example of the data:

* Example generated by -dataex-. For more info, type help dataex clear input long(pidp pid) int i_strata byte(ce_semp cg_semp cg_parent5plus ce_parent5plus cg_couple ce_couple cg_sex_cv ce_sex_cv i_qfhigh) 76165 10689869 6 1 -8 2 2 1 1 2 2 -8 280165 12430439 15 -8 . . 1 . 1 . 2 -8 469205 13857142 25 -8 . . 2 . 2 . 2 15 732365 15752658 43 -8 -8 2 2 2 2 1 1 -8 1587125 17870879 65 3 -8 2 2 2 2 2 2 -8 4849085 176725733 148 1 -8 2 2 1 1 1 1 -8 68002725 10023526 1 4 -8 2 2 2 2 2 2 -8 68008847 -8 2006 1 -8 2 2 2 2 2 2 -8 68010887 -8 2006 1 -8 2 2 1 1 2 2 -8 68031967 -8 2030 4 4 2 2 2 2 2 2 -8 68035365 10403086 4 4 -8 2 2 2 2 1 1 -8 68035367 -8 2030 1 -8 2 2 1 1 1 1 -8 68041487 -8 2042 1 -8 1 1 1 1 2 2 -8 68045567 -8 2042 1 -8 2 2 2 2 2 2 -8 68051007 -8 2054 2 -8 2 2 1 1 1 1 -8 68051011 -8 2054 1 -8 2 2 1 1 2 2 -8 68058487 -8 2054 4 -8 2 2 1 1 1 1 -8 68058491 -8 2054 4 -8 2 2 1 1 2 2 -8 68060531 -8 2054 1 -8 1 1 1 1 2 2 -8 68060533 160066204 6 4 -8 2 2 1 1 2 2 -8 68060537 160066239 6 4 -8 2 2 1 1 1 1 -8 68061288 -8 2006 -8 . . 2 . 1 . 2 -8 68063247 -8 2066 1 -8 1 1 1 1 2 2 -8 68063927 -8 2066 1 -8 1 1 1 1 2 2 -8 68063931 -8 2066 -8 -8 1 1 1 1 1 1 -8 68064605 10653872 6 4 -8 2 2 1 1 1 1 -8 68064609 10653902 6 4 -8 2 2 1 1 2 2 -8 68068007 -8 2066 1 -8 2 2 1 1 1 1 -8 68068011 -8 2066 1 . . 2 . 2 . 2 -8 68068082 -8 2006 2 -8 2 2 1 1 1 1 -8 68097245 10913629 8 4 -8 2 2 2 2 2 2 -8 68097927 -8 2090 4 -8 2 2 2 2 2 2 -8 68112211 -8 2114 1 . . 1 . 1 . 2 -8 68120367 -8 2114 4 -8 2 2 2 2 2 2 -8 68120375 -8 2114 1 -8 1 2 2 2 2 2 -8 68125127 -8 2126 1 -8 1 1 1 1 2 2 -8 68125131 -8 2126 1 -8 2 2 1 1 1 1 -8 68125135 -8 2126 1 -8 2 2 2 2 2 2 -8 68133285 11218193 11 4 -8 2 2 2 2 2 2 -8 68133289 11218282 11 4 -8 2 2 1 1 2 2 -8 68136009 11234989 11 1 -8 1 1 2 2 2 2 -8 68137365 11240547 11 -8 -8 2 2 2 2 2 2 -8 68138045 11242787 11 4 -8 2 2 1 1 1 1 -8 68138049 11242817 11 4 -8 2 2 1 1 2 2 -8 68138051 -8 2138 4 -8 2 2 1 1 2 2 -8 68144847 -8 2138 1 -8 2 2 1 1 1 1 -8 68144851 -8 2138 1 -8 1 1 1 1 2 2 -8 68148247 -8 2150 -8 -8 2 2 1 1 1 1 -8 68148251 -8 2150 4 . . 2 . 1 . 2 -8 68150967 -8 2150 1 . . 2 . 1 . 1 -8 68150971 -8 2150 1 -8 2 2 1 1 2 2 -8 68150975 -8 2150 1 -8 2 2 2 2 1 1 -8 68155047 -8 2150 -8 4 1 1 1 1 2 2 -8 68155051 -8 2150 1 4 1 1 1 1 1 1 -8 68157771 -8 2150 -8 2 2 2 2 2 2 2 -8 68159131 -8 2150 1 -8 1 1 1 1 2 2 -8 68160485 11418567 11 1 -8 1 1 2 2 2 2 -8 68160489 11418591 11 1 -8 2 2 2 2 1 1 -8 68173407 -8 2174 4 -8 2 2 1 2 2 2 -8 68174767 -8 2174 4 . . 1 . 1 . 2 -8 68180887 -8 2174 1 -8 1 1 1 1 2 2 -8 68180891 -8 2174 1 . . 1 . 1 . 1 -8 68185647 -8 2186 4 -8 2 2 2 2 2 2 -8 68187687 -8 2186 4 -8 1 1 1 1 1 1 -8 68187691 -8 2186 4 -8 1 1 1 1 2 2 -8 68191771 -8 2186 1 -8 1 1 2 2 2 2 -8 68193127 -8 2186 4 -8 1 1 2 2 2 2 -8 68195167 -8 2186 4 -8 2 2 1 1 1 1 -8 68195171 -8 2186 4 -8 2 2 1 1 2 2 -8 68195851 -8 2186 1 -8 2 2 1 1 2 2 -8 68197211 -8 2198 1 . . 2 . 1 . 2 -8 68197887 -8 2198 1 -8 1 1 2 2 2 2 -8 68197899 -8 2198 -8 -8 2 1 2 2 2 2 -8 68197903 -8 2198 -8 -8 2 2 2 2 1 1 -8 68199247 -8 2198 1 -8 2 2 1 1 1 1 -8 68207407 -8 2198 4 -8 2 2 1 1 2 2 -8 68207411 -8 2198 4 -8 2 2 1 1 1 1 -8 68211487 -8 2210 4 -8 2 2 2 2 1 1 -8 68214207 -8 2210 1 -8 2 2 2 2 1 1 -8 68214887 -8 2210 -8 . . 1 . 1 . 1 -8 68214891 -8 2210 1 . . 1 . 1 . 2 -8 68216247 -8 2210 1 -8 1 1 1 1 2 2 -8 68218287 -8 2210 -8 -8 2 2 2 2 1 1 -8 68230527 -8 2222 -8 . . 1 . 2 . 2 -8 68231223 -8 2222 4 -8 2 2 2 2 2 2 -8 68238011 -8 2234 1 -8 2 2 1 1 2 2 -8 68262487 -8 2258 2 -8 2 2 1 1 1 1 -8 68266567 -8 2258 4 -8 2 2 2 2 2 2 -8 68278127 -8 2270 4 -8 2 2 2 2 2 2 -8 68288327 -8 2282 1 -8 1 1 1 1 2 2 -8 68288331 -8 2282 1 -8 1 1 1 1 1 1 -8 68291731 -8 2282 4 -8 2 2 2 2 2 2 -8 68293087 -8 2282 4 -8 1 1 1 1 2 2 -8 68293091 -8 2282 1 -8 1 1 1 1 1 1 -8 68293095 -8 2282 1 -8 1 1 1 1 1 1 -8 68293099 -8 2282 1 -8 2 2 1 1 1 1 -8 68293168 -8 2054 4 -8 2 2 2 2 1 1 -8 68294447 -8 2294 4 4 2 2 1 1 1 1 -8 68294451 -8 2294 1 1 2 2 1 1 2 2 -8 68297845 12521361 15 4 -8 2 2 1 1 1 1 -8 end label values pid pid label def pid -8 "inapplicable", modify label values i_strata i_strata label values ce_semp ce_semp label def ce_semp -8 "inapplicable", modify label def ce_semp 1 "Yes, employed only", modify label def ce_semp 2 "Yes, self-employed only", modify label def ce_semp 3 "Both employed and self-employed", modify label def ce_semp 4 "No", modify label values cg_semp cg_semp label def cg_semp -8 "inapplicable", modify label def cg_semp 1 "Yes, employed only", modify label def cg_semp 2 "Yes, self-employed only", modify label def cg_semp 4 "No", modify label values cg_parent5plus cg_parent5plus label def cg_parent5plus 1 "Yes", modify label def cg_parent5plus 2 "No", modify label values ce_parent5plus ce_parent5plus label def ce_parent5plus 1 "Yes", modify label def ce_parent5plus 2 "No", modify label values cg_couple cg_couple label def cg_couple 1 "Yes", modify label def cg_couple 2 "No", modify label values ce_couple ce_couple label def ce_couple 1 "Yes", modify label def ce_couple 2 "No", modify label values cg_sex_cv cg_sex_cv label def cg_sex_cv 1 "Male", modify label def cg_sex_cv 2 "Female", modify label values ce_sex_cv ce_sex_cv label def ce_sex_cv 1 "Male", modify label def ce_sex_cv 2 "Female", modify label values i_qfhigh i_qfhigh label def i_qfhigh -8 "inapplicable", modify label def i_qfhigh 15 "Other school (inc. school leaving exam certificate or matriculation)", modify