Watch list problems

When using the Tracer unit to search for Lvars I stop watching any not required and click Save watching list, thus presumably, saving the list somewhere.  I go out of LINDA and return later. After starting the Lvar list I click Restore watching list but it does not stop the scrolling Lvar list and just comes up with an error mesage "List index out of bounds(1396)".  Has anybody else had this happen or is there a way of getting round this problem