Model size is about 1Mb. Still by opening stucks for couple of minutes by “loading visual components”..sometimes simply crashes..After opening model works pretty normal. What could be a reason behind such a long loading visual components?
If you are using Windows, then try first to close as many applications as possible and again open both QM and this QM model. It may turn out that your other open applications have taken a lot of memory for themselves and are hanging inactive. When you open a QM model, Windows frees RAM into the swap file on the HDD from inactive applications and tries to give RAM for QM. The swap process is slow, which you observe in the message.