Hello to all,
I am not very strong in STATA but I wrote a program. I wanted to parallelize a loop. But, while searching, I didn't find a commercial way to parallelize it directly. So I integrated the loop in a program that I parallelized afterward.

The objective is to make regression under several sub-samples chosen with the variable "rp_partner_rank".

Then I have to get information about my variable of interest: lag_fdi_in_all
and the stocks in the variables.

Code:
program define savereg
qui {
sum rp_partner_rank

forvalues i = `r(min)' (1) `r(max)' {

xi: reg rp_avg_pc_epi_gap_abs lag_fdi_in_all $contrlsorder i.year i.pccountry i.rpcountry if rp_partner_rank <= `i', vce(cl id)

lincom _b[lag_fdi_in_all], l(95)
replace beta = r(estimate) in `i'
replace se = r(se) in `i'
replace i_pos = `i' in `i'
replace lb_95 = r(lb) in `i'
replace ub_95 = r(ub) in `i'

lincom _b[lag_fdi_in_all], l(90)
replace lb_90 = r(lb) in `i'
replace ub_90 = r(ub) in `i'

lincom _b[lag_fdi_in_all], l(99)
replace lb_99 = r(lb) in `i'
replace ub_99 = r(ub) in `i'


}
}

end
preserve

drop beta se i_pos lb_* ub_*
g i_pos = .
g beta = .
g se = .
g lb_90 = .
g lb_95 = .
g lb_99 = .
g ub_90 = .
g ub_95 = .
g ub_99 = .

parallel prog(savereg): savereg
*parallel: savereg
*parallel do "$Code\saveregdo.do"
*drop if beta==.

keep beta se i_pos lb_* ub_*


parallel append, do(savereg) prog(savereg) e(3)
twoway rarea ub_90 lb_90 i_pos , astyle(ci) || ///
line beta i_pos

save "$DataCreated\asup", replace
restore

But the code doesn't work, I have tested several ways with even the "parallele do" command, saving the loop in a do file. but the results are not what I expect. Please can you help me?
here are the error results

Code:
.                                 parallel prog(savereg): savereg
--------------------------------------------------------------------------------
Parallel Computing with Stata (by GVY)
Clusters   : 4
pll_id     : l9d9vacs17
Running at : G:\Etude et biblio\Université\tours\Master2 IE\Econometrie avancee\memoire\donn
> ees\Code
Randtype   : datetime
Waiting for the clusters to finish...
cluster 0002 Exited with error -199- while running the command/dofile (view log)...
cluster 0003 Exited with error -199- while running the command/dofile (view log)...
cluster 0004 Exited with error -199- while running the command/dofile (view log)...
cluster 0001 Exited with error -199- while running the command/dofile (view log)...
--------------------------------------------------------------------------------
Enter -parallel printlog #- to checkout logfiles.
--------------------------------------------------------------------------------

.
How should I parallelize this loop?