Where does PSPP keep histogram files (working with syntax files from terminal)

[Oren Ish-Shalom]

Hi,
I’m using PSPP with syntax (*.sps files) from (a Linux) terminal.
When I ask PSPP to draw a histogram with:

GRAPH
/HISTOGRAM = NumDays_sensitive.

no error happens, but
*no image file (*.png or other)was created*. What am I missing?

Thanks! Oren