Contract-based Software, unless otherwise specifically agreed, is Standard Software that is not individually produced to fit a purchaser’s individual requirements. Delivery contracts for software are therefore purchase contracts. The parties agree therein that it is technically impossible to develop faultless Standard Software for every application purpose.<br> 5.2. If we are obliged to install software, the purchaser must ensure that the requirements we communicate to him regarding hardware, the specific IT environment, particularly connection to the computer network, are all met.<br> 5.3.