[SAC-HELP] lost headers?

[Gao, Stephen S.]

 Hi,
 
My understanding was that wsac1 keeps all the header values from the most recent rsac1 call? However, in the following example,  file tmp1.z lost all its event/station coordinates and related headers. 
 
Any hints? Thanks.  Steve Gao
 
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        nin1='tmp.z'
        call rsac1(nin1, x, npts, beg, delta, max, nerr)
 
       nin1='tmp1.z'
 
        call wsac1(nin1, x, npts, beg, delta, nerr)