The program error log appears at start and no data arrives

This can happen if some of the files used by WD have got corrupted
The info in the program error log gives some clues (double click to make it go away)
also, try reselecting the com port and station type too to at least get going again.
The files to try deleting and then restart:
latest.inf, latestindoor.inf, graphdata.inf ,graphdata2.inf,graphdata3.inf
24hourrain.inf
from the folder datafiles

or check in the wdisplay.ini file in c:\windows or c:\winnt for a bad entry of data etc
(and or email that file to me)