** testing if installed package can be loaded Error in dyn.load(file, DLLpath = DLLpath, ...) : unable to load shared object '/projects/9e10930d-01e2-450f-9308-e2629582d1b7/R/x86_64-unknown-linux-gnu-library/3.1/r stan/libs/rstan.so': /projects/9e10930d-01e2-450f-9308-e2629582d1b7/R/x86_64-unknown-linux-gnu-library/3.1/rstan/libs/rstan.so: undefined symbol: _ZN4stan5agrad18var_nochain_stack_E Error: loading failed Execution halted ERROR: loading failed * removing ‘/projects/9e10930d-01e2-450f-9308-e2629582d1b7/R/x86_64-unknown-linux-gnu-library/3.1/rstan’ Warning message: In install.packages("rstan_2.5.0.tar.gz") : installation of package ‘rstan_2.5.0.tar.gz’ had non-zero exit status