The third type of error is malfunctions which appeared when the user went outside the area of use of the tool or when they were hindered by an obstacle. VR characteristics prevent the user from perceiving their external environment. When the user went outside the area of use defined by the VR sensors bases, Simubat 4.0 Gen-2 presented slowdown, and the use became increasingly irregular. This had to do with VR technology itself. When it happened, the user could not perceive that he/she had left the area of use. In this case we noted that, users were lost and tended to be more confused about the commands (operating errors) and content (content errors). Analysis of the verbalizations shows a strong correlation between the lack of vision nodes and operational errors nodes. In our study, we noted that narrow spaces could be hindrance for VR users.