Thanks for your answer. I face a new problem.When using this scheduled
task,
this opens the excel file, but stops when excel says "contain marco.
Is there a way of disable this popup message?

you have to set macro security to low to avoid this message.

this is a security risk, however, if you are working often with excel files
with macros you'll have to set security to low 'cause otherwise you'll go
crazy when prompted every time you open an excel file. usually, virus
scanners would interfere when opening a workbook with a macro-virus, if your
only protection against viruses is excel's macro security then you have a
problem anyway.

arno