After a model has been run/executed, and the folder is refreshed, Pirana will show the main results of the run in the main window. It will show the OFV, the difference in OFV with the reference model (if specified), the number of significant digits, and some information about the estimation:
S = successful minimization
R = estimation ended with rounding errors
C = successful covariance step
M = unsuccessful covariance step due to matrix singularity
B = boundary problem
Additional information on the following topics is available:
View and compare parameter estimates
R scripts for graphs and file processing