...

    struct AcSAPrelease acrs;
    register struct AcSAPrelease   *acr = &acrs;
    struct AcSAPindication  acis;
    register struct AcSAPindication *aci = &acis;
    register struct AcSAPabort *aca = &aci -> aci_abort;

    if (AcRelRequest (sd, ACF_NORMAL, NULLPEP, 0, NOTOK, acr, aci) == NOTOK)
	acs_adios (aca, "A-RELEASE.REQUEST");

    if (!acr -> acr_affirmative) {
	(void) AcUAbortRequest (sd, NULLPEP, 0, aci);
	adios (NULLCP, "release rejected by peer: %d", acr -> acr_reason);
    }

    ACRFREE (acr);

...