ppmlhdfe doesnt't work because Stata claims reghdfe is not installed

[Jon Lewis]

When I run ppmldhdfe, I get an error message saying "reghdfe not installed". Having checked I have installed all packages with dependencies (ftools, reghdfe + ppmlhdfe), Stata still tells me
"ppmlhdfe requires the reghdfe package (version 6 or newer), which is not installed".

If I then click on the "install from SSC" link, Stata assures me:

"checking reghdfe consistency and verifying not already installed...all files already exist and are up to date."

Yet ppmlhdfe still doesn't work and I get the same error message

I have tried uninstalling all the packages and reinstalling them, but I encounter the same problem.

Minimal working example below:

 use "http://fmwww.bc.edu/RePEc/bocode/e/EXAMPLE_TRADE_FTA_DATA" if category=="TOTAL", clear
egen imp = group(isoimp) egen exp = group(isoexp)
ppmlhdfe trade lndistw, a(imp#year exp#year imp#exp) cluster(imp#exp)

I am using Stata 16.1, and the following versions of the packages
ftools: *! version 2.49.1 08aug2023
reghdfe: *! version 6.12.3 08aug2023
ppmlhdfe: *! version 2.3.0 25feb2021

[Jon Lewis]

[Code split over multiple lines]

[Joao Santos Silva]

Dear Jon Lewis,

Is your version of Stata also uo-to-date? I use Stata 16.1 without any problem.

Best wishes,

Joao

[geogia leo]

Hello all, I am new to Statalist and I’ve come to seek advice.
I think I installed the ppmlhdfe package, but I do not know why it doesn’t work.

when I check if ppmlhdfe installed completely, I found the results as follows

------------------------------------------------------------------------------
. which ppmlhdfe
C:\Users\starb\ado\plus\p\ppmlhdfe.ado
*! version 2.2.0 02aug2019
*! Authors: Sergio Correia, Paulo Guimarães, Thomas Zylkin
*! URL: https://github.com/sergiocorreia/ppmlhdfe
------------------------------------------------------------------------------
. ssc install ftools
checking ftools consistency and verifying not already installed...
all files already exist and are up to date.

. ssc install reghdfe
checking reghdfe consistency and verifying not already installed...
all files already exist and are up to date.

. ssc install ppmlhdfe
checking ppmlhdfe consistency and verifying not already installed...

the following files already exist and are different:
C:\Users\starb\ado\plus\p\ppmlhdfe.ado
C:\Users\starb\ado\plus\p\ppmlhdfe.sthlp
C:\Users\starb\ado\plus\p\ppmlhdfe.mata

no files installed or copied
(no action taken)
r(602);
------------------------------------------------------------------------------
and when I enter a command, it appears as follows:


. ppmlhdfe ImQ lnGDPi lnDISTij lnPOPi lnTARi lnPRODx NTM
always_run_lsmr_preconditioner not found in class FixedEffects
(278 lines skipped)
(error occurred while loading ppmlhdfe.ado)
r(3000);

------------------------------------------------------------------------------

I'm not sure what the problem is. Any advice would be greatly appreciated. Please help.

[Joao Santos Silva]

Dear geogia leo,

Try the following

ssc install ppmlhdfe, replace
update all

Best wishes,

Joao