trim分割实体老是报错，怎么回事？还有选中特征不能释放咋回事？

liupengxxxxx

#include <uf.h>
#include <uf_ui.h>
#include <uf_exit.h>
#include <uf_assem.h>
#include <uf_part.h>
#include <uf_layer.h>
#include <uf_modl.h>
#include <uf_obj.h>
#include <stdio.h>
#if ! defined ( __hp9000s800 ) && ! defined ( __sgi ) && ! defined ( __sun )
#   include <strstream>
#   include <iostream>
    using std:strstream;
    using std::endl;   
    using std::ends;
    using std::cerr;
#else
#   include <strstream.h>
#   include <iostream.h>
#endif
#include <uf.h>
#include <uf_ui.h>
#include <uf_exit.h>

#define UF_CALL(X) (report_error( __FILE__, __LINE__, #X, (X)))
static int report_error( char *file, int line, char *call, int irc)
{
    if (irc)
    {
        char err[133],
             msg[133];

        sprintf(msg, "*** ERROR code %d at line %d in %s:\n+++ ",
            irc, line, file);
        UF_get_fail_message(irc, err);
        UF_print_syslog(msg, FALSE);
        UF_print_syslog(err, FALSE);
        UF_print_syslog("\n", FALSE);
        UF_print_syslog(call, FALSE);
        UF_print_syslog(";\n", FALSE);

        if (!UF_UI_open_listing_window())
        {
            UF_UI_write_listing_window(msg);
            UF_UI_write_listing_window(err);
            UF_UI_write_listing_window("\n");
            UF_UI_write_listing_window(call);
            UF_UI_write_listing_window(";\n");
        }
    }
    return(irc);
}
static int init_proc( UF_UI_selection_p_t select, void *user_data )
{
    int num_triples = 3 ; //可选类型的数量
    //仅body可选
    UF_UI_mask_t mask_triples[] = {
         //{ UF_solid_type, UF_solid_body_subtype, 0} };
        // UF_solid_type, 0, UF_UI_SEL_FEATURE_ANY_FACE
        UF_feature_type, 0, UF_UI_SEL_FEATURE_ANY_EDGE,
        UF_solid_type,UF_solid_body_subtype,UF_UI_SEL_FEATURE_BODY,
            UF_datum_plane_type,0,UF_UI_SEL_NOT_A_FEATURE
};

        if ( UF_UI_set_sel_mask( select, UF_UI_SEL_MASK_CLEAR_AND_ENABLE_SPECIFIC, num_triples, mask_triples ) == 0 )
        {
            return UF_UI_SEL_SUCCESS;
        }
        else
        {
            return UF_UI_SEL_FAILURE;
        }
}
static void do_ugopen_api()
{
    tag_t body_tag=NULL_TAG;
        tag_t face_tag=NULL_TAG;
        uf_list_p_t  object_list;
        int count = 0;
    char  sCue1[]="选择特征面";
    char  sTitle1[] = "选择特征面";
    int   iScope = UF_UI_SEL_SCOPE_NO_CHANGE ;
    int   iResponse;
    tag_t tObject1;
    tag_t tView;
    double adCursor[ 3 ] ;

    char  sCue2[]="选择剖切定位面";
    char  sTitle2[] = "选择剖切定位面";
    tag_t tObject2;  

    UF_UI_select_with_single_dialog( sCue1, sTitle1, iScope, init_proc, NULL, &iResponse, &tObject1, adCursor, &tView ) ;  

    if ((iResponse == UF_UI_OBJECT_SELECTED) && (tObject1 != NULL_TAG))
    {
                UF_MODL_ask_feat_body (tObject1, &body_tag);
        UF_UI_select_with_single_dialog( sCue2, sTitle2, iScope, init_proc, NULL, &iResponse, &tObject2, adCursor, &tView ) ;  

        if ((iResponse == UF_UI_OBJECT_SELECTED) && (tObject2 != NULL_TAG))
        {
                        UF_MODL_ask_feat_faces(tObject2, &object_list);
         //获得feature中face的个数
             UF_MODL_ask_list_count(object_list,&count);
                 if(count >= 1)
                 {
                         //取出face list中第一个face的tag
                UF_MODL_ask_list_item(object_list, 0, &face_tag);
                       
         }
                int direction_flag = 0;
            tag_t  trim_feature;
         UF_MODL_trim_body (body_tag,face_tag,direction_flag,&trim_feature);

        }
    }  ;
         
}

/*****************************************************************************
**  Activation Methods
*****************************************************************************/
/*  Explicit Activation
**      This entry point is used to activate the application explicitly, as in
**      "File->Execute UG/Open->User Function..." */
extern DllExport void ufusr( char *parm, int *returnCode, int rlen )
{
    /* Initialize the API environment */
    if( UF_CALL(UF_initialize()) )
    {
        /* Failed to initialize */
        return;
    }

    /* TODO: Add your application code here */
        do_ugopen_api();
    /* Terminate the API environment */
    UF_CALL(UF_terminate());
}

/*****************************************************************************
**  Utilities
*****************************************************************************/

/* Unload Handler
**     This function specifies when to unload your application from Unigraphics.
**     If your application registers a callback (from a MenuScript item or a
**     User Defined Object for example), this function MUST return
**     "UF_UNLOAD_UG_TERMINATE". */
extern int ufusr_ask_unload( void )
{
    return( UF_UNLOAD_UG_TERMINATE );
}