Bad allocation
This is a general message about the program having memory troubles. It does not say anything about why. Some reasons can be:
The model and/or project has parentheses in the name. Unfortunately it is possible to create models and projects with parentheses in the name, but it will give trouble later on in some server operations. Don't use parentheses in model or project names. If you already have a workset with work you can't share, change the directory names of the workset so they don't contain parentheses. Then open the model with "Open single user model".
Some times simply restarting Quadri helps.