FatalExecutionEngineError ...

Hello!
I'm re-building the graphics display for (opensource) parametric EQ GUI for EqualizerAPO (a Forms app, VS2013.4/C++ Express/.NET 4.5).
Previous version of graphics display has been working without issues but now I need to get this working a bit faster....
I made radical changes and now I get this error after few changes in GUI (sliders):
Is it a bug or my coding making this error happen? This is a realtime system so there's quite a bit happening after each change flag from sliders.... Isn't that error code 0xc0000005 a Access violation error? Could it come from repetitive handling of
chart module?
Graphics display is based on Chart module.
Previously I had the Hz axis data (4096 data points covering 10Hz-32kHz cells)) split into 7 parts (4 different display options + smoother graph on low/high ends).
Here's the new code (width of Hz axis is say 400px so now I collect only 400 data values logarithmically from whole Hz range). First method prepares the plot data for the chart and the second one fills the chart table cells to display
it.
private: System::Void drawFRCurves(){
if (chart1->Enabled){
initCoefficients();
clearSampleDataSlot();
double pi = 3.14159265358979323846f;
double Fs = 96000.0;
int sample;
int filterCount = 12;
int startFr, endFr;
long double w;
long double numerator;
long double denominator;
long double magnitude;
bool skip11 = !option_state[currentSpeakerMode][currentChannel].lp;
bool skip12 = !option_state[currentSpeakerMode][currentChannel].hp;
int position = 0;
//System::IO::StreamWriter^ pwriter = gcnew System::IO::StreamWriter("c:\\Temp\\plot.txt");
switch (graphMode){
case 0:
startFr = 10;
endFr = 32000;
break;
case 1:
startFr = 10;
endFr = 200; // with 400 same issue
break;
case 2:
startFr = 10;
endFr = 500;
break;
case 3:
startFr = 100;
endFr = 2000;
break;
for (sample = 1; sample < 401; sample++){
magnitude = 0.0L;
position = System::Convert::ToInt32(LogSlider(sample, 1, 400, startFr, endFr));
if (position < sample || sample < 20){ position = sample; } // smoother graph for lowest frequencies
w = 2.0L*pi*position/Fs;
for (int s = 1; s < filterCount + 1; s++){
if (bandActivity[s].Checked || s > 10){
if (s == 11 && skip11){ continue; }
if (s == 12 && skip12){ continue; }
int o = 1;
if (s == 11){ o = option_state[currentSpeakerMode][currentChannel].lpOrder; }
if (s == 12){ o = option_state[currentSpeakerMode][currentChannel].hpOrder; }
for (int j = 1; j < o + 1; j++){
numerator = coefficient[s].b0*coefficient[s].b0 +
coefficient[s].b1*coefficient[s].b1 +
coefficient[s].b2*coefficient[s].b2 +
2.0L*(coefficient[s].b0*coefficient[s].b1 +
coefficient[s].b1*coefficient[s].b2)*cosl(w) +
2.0L*coefficient[s].b0*coefficient[s].b2*cosl(2.0L*w) +
0.0000000000000001L;
denominator = 1.0L +
coefficient[s].a1*coefficient[s].a1 +
coefficient[s].a2*coefficient[s].a2 +
2.0L*(coefficient[s].a1 +
coefficient[s].a1*coefficient[s].a2)*cosl(w) +
2.0L*coefficient[s].a2*cosl(2.0L*w) +
0.0000000000000001L;
magnitude = 10 * log10(fabs(numerator / denominator));
SampleData[0][sample].output = SampleData[0][sample].output + magnitude;
if (s < 11){
SampleData[s][sample].output = magnitude;
//pwriter->WriteLine("sample " + sample.ToString() + " value = " + SampleData[0][sample].output.ToString() + " pos=" + position.ToString());
//pwriter->Close();
drawCurve(showAllGraph->Checked);
private: System::Void drawCurve(bool all){
//System::IO::StreamWriter^ pwriter = gcnew System::IO::StreamWriter("c:\\Temp\\inplot.txt");
if (chart1->Enabled){
double masterGaindB = 0.0f;
int startFr, endFr;
int endLoop = 1;
int chartWidth = 400;
int ser = 1;
String^ seriesName = nullptr;
if (all){
endLoop = 11;
for (ser = 0; ser < endLoop; ser++){
switch (ser){
case 0:
seriesName = "SeriesAll";
if (all){
chart1->Series[seriesName]->BorderWidth = 2;
else{
chart1->Series[seriesName]->BorderWidth = 1;
break;
default: seriesName = "Series"+ ser.ToString(); break; }
if (includeMasterGainInGraph->Checked && includeMasterGainInGraph->Enabled){
masterGaindB = System::Convert::ToDouble(label3->Text);
chart1->Series[seriesName]->Points->Clear();
if (ser == 0 || bandActivity[ser].Checked){
switch (graphMode){
case 0:
startFr = 10;
endFr = 32000;
break;
case 1:
startFr = 10;
endFr = 200; // with 400 same issue
break;
case 2:
startFr = 10;
endFr = 500;
break;
case 3:
startFr = 100;
endFr = 2000;
break;
for (int sample = 1; sample < chartWidth+1; sample++){
int position = System::Convert::ToInt32(LogSlider(sample, 1, 400, startFr, endFr));
if (position < sample || sample < 20){ position = sample; }
if (abs(SampleData[ser][sample].output) > 32.0f){
SampleData[ser][sample].output = 32.0f * (SampleData[ser][sample].output / abs(SampleData[ser][sample].output));
chart1->Series[seriesName]->Points->AddXY(position, (SampleData[ser][sample].output + masterGaindB));
//pwriter->WriteLine("sample " + sample.ToString() + " value = " + SampleData[ser][sample].output.ToString() + " pos=" + position.ToString());
//pwriter->Close();}

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Hi Bigmachini,
According to my solution, what about your issue now?
If you have been solved the issue, would you mind sharing us the solution here? So it would be helpful for other members who get the same issue.
If not, please let us know the latest information about it.
@Malik, could you please tell me if you try to check your issue by the above suggestion as I said?
If no, please try the above suggestions to check this issue and then tell me the latest message about this issue.
>>The error mostly occurs when debugging ADO.NET or database function calls. If code is run without debugging then there is no issue at all.
You could also try to copy your project and then debug your project in debug mode on a another machine you install same Windows 10 OS check this issue again.
Best Regards,
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FatalExecutionEngineError ...

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