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By default, the pipeline will run to produces images that encompass the whole field of view and at the nominal spatial and spectral resolution offered by the data. This avoids ignoring some information, but unfortunately maximizes data sizes and compute time.
The pipeline run time is heavily dependent on the size of images, and (obviously), the size of its output even more. It is thus highly recommended to define a proper map size, as well as proper imaging arguments, before running the pipeline. This involves variables MAP_FIELD, MAP_CELL and MAP_ROBUST.
Similarly, the pipeline run time and required space scales quasi-linearly with the number of output channels. It is thus also strongly recommended to specify the proper values of the velocity coverage in All%Range.
To do so, it is best to select a representative UV data set and explore it interactively, in order to define the best compromise (smallest possible field of view given the source size, largest acceptable cell size to avoid undersampling, appropriate velocity resolution and coverage).
The PIPELINE EXPLORE step is particularly adapted for this purpose.