This will clear the internal topic cache used by the help system. The cache saves topic references as offsets into the help (.hlp) files, so that if the text of a help file is modified, the offsets are probably no longer valid. This function is useful when editing the text of a help file, while viewing the entry in WRspice. Use this function when editing is complete, before reloading the topic into the viewer. Although the offset to the present topic does not change when editing, so that simply reloading would look fine, other topics in the file that come after the present topic would not display correctly if the offsets change.
This is the same effect as giving the help command with the -c option.