Error mesage : error: variable is empty after factor/time expansion

[JungKoo Kang]

Dear STATALIST members,

I have a big data with size of 40GB RAM and ran a regression using on STATA Linux version(MP, 4 core). I ran following regression command but encounted an error message. But I was able to run the data without control variables. I could not find related posts on this error message. Can you please help me with this. Variables are not empty so I do not know what doe this mean. Thank you!

global control fund_size_log fund_return log_mktcap_lag leverage_lag roa_lag mtb

eststo M_1: reghdfe inv_amount_chg c.car_q_chg_n##i1.local $control , absorb(qrank) vce(cluster mgrno_n#ticker_n#qrank ticker_n#qrank)
error: variable -i1.local- in varlist - 1.local#c.car_q_chg_n fund_size_log fund_return log_mktcap_lag leverage_lag roa_lag mtb- in category -indepvars- is empty after factor/time expansion
r(198);


Error mesage : error: variable -i1.local- in varlist - 1.local#c.car_q_chg_ fund_return log_mktcap_lag leverage_lag roa_lag mtb- in category -indepvars- is empty after factor/time expansion

[JungKoo Kang]

Can anyone help me what the error message mean? It seems there is a problem is the dataset but I have no ideas what to look, descriptive stat looks find. I could not find any references on this..

[Clyde Schechter]

The error message is coming from -reghdfe- (not -eststo-). -reghdfe- is a community-contributed program written by Sergio Correa. As nobody else in the Forum seems to know what the problem might be, you might try to reach him directly with your question.

[JungKoo Kang]

Thank you so much! I reach out to him.