The most common cause of a Project not being available for use is that its status is set to something like 'Completed' which means it cannot be used on transactions. To check this:
Log in to Dimensions
Browse to Costing, Projects
Find the project being used on the purchase request
Ensure the status is set to 'Active' (A) or 'Reopened' (R) which are the only statuses that allow you to raise transactions against them
The other common cause, is that you have a filter set inside of FocalPoint Administrator and the Project you want to use is being filtered out of the results. To check this:
Log in to FocalPoint Administrator
Browse to System Options, Purchasing, Purchase Request Setup
Highlight the purchase request type being used and click Edit
On the General tab, check if there is a "Project Filter" being used
If there is, check what this filter is set to and make a note of this
Now log in to Dimensions
Browse to Costing, Projects
Find the project being used on the Purchase Request
Ensure it meets the criteria as noted above in the filter and if not, update accordingly or remove the filter altogether
If neither of these fixes resolve your problem, please raise a new case and reference the title of this article.