I just updated the source and apparently something has changed because now  opening any  native Gretl  data file returns an error like the following: --- Data file is empty Error executing script: halting > open mroz  --- The same for djclose, sw_ch14..and any other file. Anyway if I try to access them by the menu Gretl opens them without problems. Even stranger, if i give the complete path with a command like open /usr/local/share/gretl/data/misc/mroz.gdt [ and the file does exist] it returns the same error