Did the exchange rate difficulties experienced by countries under the ERM strengthen or weaken the arguments for

Question:

Did the difficulties experienced by countries under the ERM strengthen or weaken the arguments for progressing to a single European currency?

Exchange Rate
The value of one currency for the purpose of conversion to another. Exchange Rate means on any day, for purposes of determining the Dollar Equivalent of any currency other than Dollars, the rate at which such currency may be exchanged into Dollars...