Hello Problem 1. In the code below I have noticed that this line-> std::string what = "/why/do/I/delete"; will cause all files in this folder, set here line-> char work_dir[]="/home/ryan/workspace/TesterTest"; to be deleted. If this line is deleted or commented out line-> std::string what = "/why/do/I/delete"; then nothing gets deleted, i.e everything works fine. Problem 2. Now taking the code below, If you set this line-> int use_matrix = 1; /* or 0 */ as such and delete the following two lines line-> char work_dir[]="/home/ryan/workspace/TesterTest/"; line-> strcpy(config_path.workdir ,work_dir); then correlogram_plot will not show the plot if this line-> std::string what = "/why/do/I/delete"; is at the end of the program Below is all the code needed to recreate the problem. Is this a problem specific to me or is any one else able to recreate these two issues Thank you #include <iostream> #include <sstream> #include <fstream> #include <gretl/libgretl.h> #include <vector> int arma_estimate (DATASET *dset, PRN *prn, int *resid_id) { MODEL *model; int *list; int err; model = gretl_model_new(); list = gretl_list_new(5); list[1] = 1; /* AR order */ list[2] = 0; /* order of integration */ list[3] = 1; /* MA order */ list[4] = LISTSEP; /* separator */ list[5] = 1; /* position of dependent variable in dataset */ *model = arma(list, NULL, dset, OPT_NONE, prn); err = model->errcode; if (err) { errmsg(err, prn); } else { printmodel(model, dset, OPT_NONE, prn); } if (!err) { /* save arma residual series? */ int v; dataset_add_allocated_series(dset, model->uhat); v = dset->v - 1 ; /* ID number of last series */ strcpy(dset->varname[v], "residual"); *resid_id = v; model->uhat = NULL; /* don't double free! */ } gretl_model_free(model); free(list); return err; } int CorrgramGretl (int varno, int order, int nparam, DATASET *dset, gretlopt opt, PRN *prn) { int err; err = corrgram(varno, order, nparam, dset, opt, prn); if (err) { errmsg(err, prn); } return err; } int main (void) { int use_matrix = 0; /* or 0 */ int use_residual = 1; /* or 0 */ int vnum; /* series ID for correlogram */ gretlopt opt = OPT_NONE; DATASET *dset; PRN *prn; int err; libgretl_init(); ConfigPaths config_path; /* tell libgretl where to find gnuplot */ //gretl_set_path_by_name("gnuplot", "/usr/bin/gnuplot"); char gnu_dir[]="/usr/local/bin/gnuplot"; strcpy(config_path.gnuplot ,gnu_dir); char work_dir[]="/home/ryan/workspace/TesterTest"; strcpy(config_path.workdir ,work_dir); err = gretl_set_paths (&config_path); dset = datainfo_new(); prn = gretl_print_new(GRETL_PRINT_STDOUT, NULL); err = gretl_read_native_data("/usr/local/share/gretl/data/ramanathan/data9-7.gdt", dset); if (!err && use_residual) { opt = OPT_R; err = arma_estimate(dset, prn, &vnum); } else { vnum = 2; /* or whatever */ } if (err) { errmsg(err, prn); exit(EXIT_FAILURE); } int order = 7; /* or whatever */ if (use_matrix) { /* call correlogram_plot() directly */ gretl_matrix *cmat; cmat = acf_matrix(dset->Z[vnum], order, dset, dset->n, &err); if (!err) { /* take pointers into the two @cmat columns */ const double *acf = cmat->val; const double *pacf = acf + cmat->rows; /* set the plus/minus range */ double pm = 1.96 / sqrt(dset->n); correlogram_plot(dset->varname[vnum], acf, pacf, NULL, order, pm, opt); } gretl_matrix_free(cmat); } else { /* emulate "command"-style call */ opt = OPT_U; /* add --plot=<whatever> */ /* supply the parameter to --plot */ set_optval_string(CORRGM, OPT_U, "display"); err = CorrgramGretl(vnum, order, 1, dset, opt, prn); } destroy_dataset(dset); gretl_print_destroy(prn); libgretl_cleanup(); std::string what = "/why/do/I/delete"; return 0; }