#86 Something wrong with the BLT demo "stripchart1.tcl"

[eloelo]

I installed Tcl/Tk 8.3.4 and BLT(for Tcl 8.3)
correctly,but the BLT demo "stipchart1.tcl" seems to
contain some errors.
My plat form:windowsme,tcl/tk8.3.4,blt(for tcl8.3)
It can run correctly until I click its menu command.
As long as I implement the menu command "Add
source...",it will pop up an error message:
-----------------------------------------------------------
Syntax error in expression"+0.1*(3.02696759259-)"
Syntax error in expression"+0.1*(3.02696759259-)"
while executing
expr $y(end)+0.1*($sources($name-steady)-$y
(end))"
(procedure "source_event" line 16)
invoked from within
"source_event work 100"
("after" scipts)
-----------------------------------------------------------

and another menu command "Preferences" also
contains the same problem.