Escher Group Holdings shares slumped on Wednesday after it said it expected full-year revenues to be down due to a setback in negotiations for a license agreement.The provider of outsourced, point-of-sale software to the postal industry said the negotiations will continue into 2015, with the delay dragging revenues down 15% and adjusted earnings before interest, taxes, depreciation, and amortisation will be below current market expectations.Chief executive Liam Church said: "The second half of the last financial year has been disappointing as considerable pipeline activity has not yet converted into finalised agreements."However, we remain in a strong position going forward, given our product portfolio and international pipeline of opportunities."In its half year report released in September, the company said it financial outcome depended on a license sale and the roll-out by a major customer of its integrated Riposte solution.It reported revenues of $11.08m, down from $12.87m the year before due to a transition of contracts from development and customisation phase to a roll-out phase.Shares in Escher were down 17.53% to 200p on Wednesday at 10:15.