AngelHunter

i have a const double array, and when i want to copy a value, for example: typedef struct { double x, y, z} array3; const array3* v; double my_value; my_value = v->x; and labview crashes, and the debug window shows this line as the cause. with some access violation error messages.... anybody encountered something like this? please help me... thank you!

active is defined as a global variable, to keep its value when the CIN runs again and the second question is right, i will fix it now.... no, i think it's all right. also, i deleted it and the problem persists....

first of all, I have some global data, in it 2 structures typedef struct { LVBoolean status; int32 code; LStrHandle source; } LVError; typedef struct { int32 dimSizes[2]; float64 arg1[1]; } LVpotty; typedef LVpotty **LVpottyHdl; the first is the error handler, the second is a simple labview array double toltes[120][3]; //this is an array in which i collect the data and then tranform it to a labview type array and pass it through the CIN in the CINInit I have place calls that start up the device i will be using, these are calls to functions in the device's SDK the ints and floats in the CINRun routine are values whose value is decided in the CINInit() LVpottyHdl potty - this is the struct above, the array VError *zebriserror - is error handling CIN MgErr CINRun(int32 *lchannelcount, float64 *latomduration, float64 *lfrequency, int32 *lmotionquantsperatom, LVpottyHdl potty, float64 *kijelzo, LVError *zebriserror) { zebriserror->status = LVTRUE; // means there is no error *lchannelcount = motionChannelCount; // decided in CINInit *latomduration = atomDuration; *lmotionquantsperatom = motionQuantsPerAtom; *lfrequency = motionQuantsPerAtom/atomDuration; // start the device //this is maybe where the problem is. if i don't use the activate flag //than the program stops here and it sais that the current configuration //won't allow this to execute (error handling tells me) //so when i put this in, the second time this CIN executes, it just crashes if (active==false) { active = true; if (!ZebDevice_Start(device)) goto __end; } if (!motionFeed(1)) //call the routine that gathers the data goto __end; k = 6/motionChannelCount; //determines how many data a sensor has (it can be adjusted...) *kijelzo = k; // fill up the out array, and in order for (i=0; i<6; i++) switch (i % motionChannelCount){ case 0: for(j=0; j<3; j++) (**potty).arg1[i/motionChannelCount*3 + j] = toltes[j]; break; case 1: for(j=0; j<3; j++) (**potty).arg1[k*3 + i/motionChannelCount*3 + j] = toltes[j]; break; case 2: for(j=0; j<3; j++) (**potty).arg1[k*6 + i/motionChannelCount*3 + j] = toltes[j]; break; case 3: for(j=0; j<3; j++) (**potty).arg1[k*12 + i/motionChannelCount*3 + j] = toltes[j]; break; case 4: for(j=0; j<3; j++) (**potty).arg1[k*24 + i/motionChannelCount*3 + j] = toltes[j]; break; case 5: for(j=0; j<3; j++) (**potty).arg1[k*48 + i/motionChannelCount*3 + j] = toltes[j]; break; } // stop the device if (!ZebDevice_Stop(device)) goto __end; zebriserror->status = LVFALSE; // there was no error __end: if (device) ZebDevice_Release(device); if (zebriserror->status) //error handling { const char *cerrorstr = Zeb_GetLastError(); int32 length = strlen(cerrorstr); if (cinerror = NumericArrayResize(uB, 1L, (UHandle*)&zebriserror->source, length)) goto out; LStrLen(*zebriserror->source) = length; MoveBlock((const void*)cerrorstr, LStrBuf(*zebriserror->source), length); } return noErr; out: return cinerror; } BOOL motionFeed(int atomCount) //the main data gathering routine { if (!motionInput) return TRUE; const ZebVector3* pos[MAX_MOTION_CHANNELS]; for(int ch = 0; ch < motionChannelCount; ch++) { if (!ZebMotionChannel_GetPos(motionChannels[ch], &pos[ch])) return FALSE; } for(int ctr = atomCount*motionQuantsPerAtom; ctr--; ) { for(int ch = 0; ch < motionChannelCount; ch++) { const ZebVector3* v = pos[ch]++; //this is where i fill up the array (a global array) toltes[szamlalo][0] = v->x; toltes[szamlalo][1] = v->y; toltes[szamlalo][2] = v->z; szamlalo++; } } return TRUE; } i tried using a dynamic array but then labview crashed even on the first run...

I need to call a single CIN multiple times in a loop and the second time it doesn't finish but the program crashes. i think it is because of memory allocation problems. the first call is OK, only the second is troublesome. could somebody plz explain how i can allocate enough memory or somehow else solve this problem? thank you very much