[quote user="Richard Phillips"]All my cells and .CSF files are in the same project directory ... I made them in the C:\ProgramData\Bentley\MicroStation V8i (SELECTseries)\WorkSpace\Projects\Rjbp[/quote]
Follow Jan's advice and first define configuration variable MS_CELLSELECTORDIR. You define a config. variable in one of your configuration files. Since you want to keep your work separate from the mainstream, put the definition in your user configuration file (*.ucf). It should look something like this ...
RJBP = C:/ProgramData/Bentley/MicroStation V8i (SELECTseries)/WorkSpace/Projects/Rjbp/ MS_CELLSELECTORDIR > $(RJBP)cell/
To clarify what's going on here, the first line defines your personal folder \RJBP. The second line appends your personal \cell folder to the MicroStation variable MS_CELLSELECTORDIR. MicroStation automatically expands variables enclosed in the $() syntax. By convention, we use the forward-slash as the directory separator in configuration files. After editing a configuration file, you normally should restart MicroStation to see your changes take effect.
Now that MicroStation can see your \cell folder, it should be able to find your .csf files.