打开光栅文件错误：调试器附加到w3wp exe但未配置

Question

我写了一个vb.net函数来打开一个光栅文件。功能如下：

class ActiveTexturePool {

    static const GLint maximumActiveTextures = 16; // number of maximum units
    GLint currentActiveTextureID[maximumActiveTextures]; // have the container

    ActiveTexturePool() { // a constructor is needed to reset the data
        memset(currentActiveTextureID, 0, sizeof(currentActiveTextureID)); // sets all to zero
    }

    class ActiveTextureObject {
    public:
        GLuint textureID;
        GLenum activeTextureID;

        void generateNew() {
            useActive();
            glGenTextures(1, &activeTextureID);
        }

        void useActive() {
            glActiveTexture(activeTextureID);
        }
        void bind() {
            glBindTexture(GL_TEXTURE_2D, textureID);
        }
        void bindAndUseActive() {
            useActive();
            bind();
        }
    };

    ActiveTextureObject getNewTextureObject() {
        ActiveTextureObject toReturn;

        for(GLint i=0; i<maximumActiveTextures; i++) {
            if(currentActiveTextureID[i] == 0) {
                GLenum activeTexture = GL_TEXTURE0 + i;

                currentActiveTextureID[i] = activeTexture;
                toReturn.activeTextureID = activeTexture;

                return toReturn;;
            }
        }
        return NULL; // the pool is full, you may not create another active texture!
    }

    void recycleTexture(ActiveTextureObject texture) { // remove from the pool
        for(GLint i=0; i<maximumActiveTextures; i++) {
            if(currentActiveTextureID[i] == texture.activeTextureID) {
                currentActiveTextureID[i] = 0;
                texture.activeTextureID = 0;
                // you may also delete the data here but that should most likely be handled by the ActiveTextureObject
                break;
            }
        }
    }
};

以上函数在TryCast语句中抛出以下错误：

调试器附加到w3wp exe但未配置为调试此未处理的异常。要调试此表达式，请分离当前调试器。

我也在谷歌搜索过，一些建议是在IIS应用程序池中启用32位，但启用此功能也不会使代码正常工作