fixes open PDF - calls open-function only once (see #175)
fixes open PDF - calls open-function only once (see #175)

fhstp-mfg/mobilot,fhstp-mfg/mobilot,fhstp-mfg/mobilot,fhstp-mfg/mobilot,fhstp-mfg/mobilot,fhstp-mfg/mobilot,fhstp-mfg/mobilot,fhstp-mfg/mobilot,fhstp-mfg/mobilot,fhstp-mfg/mobilot