Assert with new operator?

I recently wrote a program that loaded the .3do file type (it''s a 3D file format). It worked just fine, and then I tried to turn it into a class and it''s now giving me this: Screenshot The problem always occurs here:

vector<string*>      lines;
ifstream file(filename);
	while(!file.eof())
	{
		char* temp = new char[999]; //This Line causes the error

		file.getline(temp, 999);
		if(temp[0] == ''#'')
		{
			goto end;
		}
		lines.push_back(new string(temp));
		NumLines++;
		end:
		delete[] temp;
	}

This code read the file and puts it into a vector of strings, as well as removing comments (lines that start with a #) when I run in debug mode. And in normal mode the program crashes if I hit retry on that dialog box. Any ideas as to why?