# Error in sink(type = “output”) : invalid connection
**URL:** https://discourse.mc-stan.org/t/error-in-sink-type-output-invalid-connection/23429
**Category:** Modeling
**Tags:** installation, rstan
**Created:** [July 13, 2021, 11:04am UTC](https://discourse.mc-stan.org/t/error-in-sink-type-output-invalid-connection/23429 "2021-07-13T11:04:53Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Costa](https://discourse.mc-stan.org/u/Costa)
#### Post date: [July 13, 2021, 11:04am UTC](https://discourse.mc-stan.org/t/error-in-sink-type-output-invalid-connection/23429/1 "2021-07-13T11:04:53Z")
Hi all,
I am pretty new with Stan. However, in the past months I have been able to run, without too many problems, various models. Recently, I have added a new model:
```
modelFitRef_LM <- stan(
file = "deltaRuleLinearModel.stan", # Stan program; make sure this is in the same directory you have declared at the top of this script.
data = allDataStan, # named list of data
chains = 4, # number of Markov chains
warmup = 2000, # number of warmup iterations per chain
iter = 4000, # total number of iterations per chain
cores = 4, # number of cores (could use one per chain)
refresh = 0 # no progress shown
)
```
which is a very similar model to others that have presented no issue at all in running. In addition, colleagues of mine did not have any problems in running this script so I believe it is something wrong with my machine.
This is the error message that I receive:
```
Warning in system(paste(CXX, ARGS), ignore.stdout = TRUE, ignore.stderr = TRUE) :
'C:/rtools40/usr/mingw_/bin/g++' not found
make cmd is
make -f "C:/PROGRA~1/R/R-40~1.2/etc/x64/Makeconf" -f "C:/PROGRA~1/R/R-40~1.2/share/make/winshlib.mk" CXX='$(CXX14) $(CXX14STD)' CXXFLAGS='$(CXX14FLAGS)' CXXPICFLAGS='$(CXX14PICFLAGS)' SHLIB_LDFLAGS='$(SHLIB_CXX14LDFLAGS)' SHLIB_LD='$(SHLIB_CXX14LD)' SHLIB="file16907b108d9.dll" WIN=64 TCLBIN=64 OBJECTS="file16907b108d9.o"
make would use
"C:/rtools40/mingw64/bin/"g++ -std=gnu++14 -I"C:/PROGRA~1/R/R-40~1.2/include" -DNDEBUG -I"C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/Rcpp/include/" -I"C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/RcppEigen/include/" -I"C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/RcppEigen/include/unsupported" -I"C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/BH/include" -I"C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/StanHeaders/include/src/" -I"C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/StanHeaders/include/" -I"C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/RcppParallel/include/" -I"C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/rstan/include" -DEIGEN_NO_DEBUG -DBOOST_DISABLE_ASSERTS -DBOOST_PENDING_INTEGER_LOG2_HPP -DSTAN_THREADS -DBOOST_NO_AUTO_PTR -include "C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/StanHeaders/include/stan/math/prim/mat/fun/Eigen.hpp" -std=c++1y -O2 -Wall -mfpmath=sse -msse2 -mstackrealign -c file16907b108d9.cpp -o file16907b108d9.o
if test "zfile16907b108d9.o" != "z"; then \
if test -e "file16907b108d9-win.def"; then \
echo "C:/rtools40/mingw64/bin/"g++ -shared -s -static-libgcc -o file16907b108d9.dll file16907b108d9-win.def file16907b108d9.o "C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/rstan/lib/x64/libStanServices.a" -L"C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/StanHeaders/libs/x64" -lStanHeaders -L"C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/RcppParallel/lib/x64" -ltbb -L"C:/PROGRA~1/R/R-40~1.2/bin/x64" -lR ; \
"C:/rtools40/mingw64/bin/"g++ -shared -s -static-libgcc -o file16907b108d9.dll file16907b108d9-win.def file16907b108d9.o "C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/rstan/lib/x64/libStanServices.a" -L"C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/StanHeaders/libs/x64" -lStanHeaders -L"C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/RcppParallel/lib/x64" -ltbb -L"C:/PROGRA~1/R/R-40~1.2/bin/x64" -lR ; \
else \
echo EXPORTS > tmp.def; \
"C:/rtools40/mingw64/bin/"nm file16907b108d9.o | sed -n 's/^.* [BCDRT] / /p' | sed -e '/[.]refptr[.]/d' -e '/[.]weak[.]/d' | sed 's/[^][^]*/"&"/g' >> tmp.def; \
echo "C:/rtools40/mingw64/bin/"g++ -shared -s -static-libgcc -o file16907b108d9.dll tmp.def file16907b108d9.o "C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/rstan/lib/x64/libStanServices.a" -L"C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/StanHeaders/libs/x64" -lStanHeaders -L"C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/RcppParallel/lib/x64" -ltbb -L"C:/PROGRA~1/R/R-40~1.2/bin/x64" -lR ; \
"C:/rtools40/mingw64/bin/"g++ -shared -s -static-libgcc -o file16907b108d9.dll tmp.def file16907b108d9.o "C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/rstan/lib/x64/libStanServices.a" -L"C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/StanHeaders/libs/x64" -lStanHeaders -L"C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/RcppParallel/lib/x64" -ltbb -L"C:/PROGRA~1/R/R-40~1.2/bin/x64" -lR ; \
rm -f tmp.def; \
fi \
fi
Error in compileCode(f, code, language = language, verbose = verbose) :
from file16907b108d9.cpp:14:C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/StanHeaders/include/stan/math/rev/core/set_zero_all_adjoints.hpp: At global scope:C:/Users/ic18563/OneDrive - University of Bristol/Documents/R/win-library/4.0/StanHeaders/include/stan/math/rev/core/set_zero_all_adjoints.hpp:14:13: warning: 'void stan::math::set_zero_all_adjoints()' defined but not used [-Wunused-function] static void set_zero_all_adjoints() { ^ ~~~~~~~~~~~~~~~~~~~~ make: *** [C:/PROGRA~1/R/R-40~1.2/etc/x64/Makeconf:229: file16907b108d9.o] Error 1
Error in sink(type = "output") : invalid connection
```
I have tried all the suggestions recommended in the forum without any success in solving the issue.
I am using this R version:
RStudio Version 1.4.1717
and this Stan version:
```
packageVersion("rstan")
[1] ‘2.21.2’
```
and I am working with Windows 10 Enterprise.
Please any suggestion is welcome! I have tried now to solve this problem for a while and without any success.
Many thanks in advance for your help!
---
### Author:  [@martinmodrak](https://discourse.mc-stan.org/u/martinmodrak)
#### Post date: [July 31, 2021, 5:08am UTC](https://discourse.mc-stan.org/t/error-in-sink-type-output-invalid-connection/23429/2 "2021-07-31T05:08:09Z")
Hi, sorry for not getting to you earlier.
It looks like your configuration/installation/toolchain broke at some point (possibly due to upgrading something else). Could you try either (re-)installing latest rstan (via [Repository for distributing (some) stan-dev R packages | r-packages](https://mc-stan.org/r-packages/) - unfortunately not on CRAN) which has some improved diagnostics, or try using `cmdstanr` ([Getting started with CmdStanR • cmdstanr](https://mc-stan.org/cmdstanr/articles/cmdstanr.html))?
---
### Author:  [@Costa](https://discourse.mc-stan.org/u/Costa)
#### Post date: [September 7, 2021, 10:33am UTC](https://discourse.mc-stan.org/t/error-in-sink-type-output-invalid-connection/23429/3 "2021-09-07T10:33:45Z")
Thanks Martin, using `cmdstanr` overran the problem!