The "No Solutions Yet" message will appear within the Path Analysis when one or more phases is not covered by either a bid from a subcontractor, or a budgeted dollar amount for that phases(s).
The following screenshot provides an example of a matrix that does not yet have a valid solution. There are two lump sum subcontractor bids, neither of which cover the all the phases included in the matrix, and neither of the bids can be combined with a phase budget, because no budget exist for the phases not covered by the lump sum bids.
It is also possible to apply conditions to the matrix, "required bids", "excluded" bids, as well as "limit" the number of subcontractors. These applied conditions could result in a scenario where you no longer have a valid "Conditional" or "Selected" solution.
The following screenshot is an example of a lump sum bid that has been "required", but that bid only covers two of the five phases in the matrix. The only other bid in the matrix is another lump sum bid that covers all five phases, but it cannot be used because of the condition that was applied to "require" the other subcontractor for two of the phases. That being the case, the "No Solutions Yet" message will appear for both the Conditional path and the current Selected path. The "Absolute Low Path" will display, showing that there is in fact a valid path, if you were to remove the applied conditions that are preventing a valid Conditional or Selected solution.