The inconvertibility of their currency made international trade impossible.    From Wordnet, Princeton University. 

Thus, dollar inconvertibility into gold came internationally some 37 years after President Roosevelt suspended domestic dollar convertibility in 1933.    From Wordnik.com.  [The World Monetary System: A Pattern for the Future] Reference

The business of insuring foreign investors against sovereign acts like expropriation, change in law, currency inconvertibility and war-so-called "political risk insurance" - is not new.    From Wordnik.com.  [World Bank Props Up Despots With New 'Corruption' Loans] Reference

There is also some inconvertibility within the sterling area between the British pound and for example the Australian, since imports have still to be limited for balance of payments reasons.    From Wordnik.com.  [Our Common Wealth] Reference

Similarly, who, in 1948, when rigid exchange controls and inconvertibility of currencies prevailed almost around the world, would have believed that the international money market could possibly be as fluid and free as it is now in 1962.    From Wordnik.com.  [Fifteen Years at the World Bank] Reference

Now we realize that tariffs are only a minor factor under present chaotic conditions of world trade and finance which is bedevilled by managed currencies, competitive currency devaluations, arbitrary and discriminatory exchange controls, inconvertibility of currencies, discriminatory export and import quotas, customs regulations and other devices too numerous to mention.    From Wordnik.com.  [Canada's To-day] Reference

On examining the results, it will be found that the cause of its ending is the inconvertibility of O.    From Wordnik.com.  [Logic Deductive and Inductive] Reference

With the inconvertibility of these bonds, they cannot reduce the annual budget deficit; they can only be defaulted upon to reduce the national debt by that 2.6 trillion dollars.    From Wordnik.com.  [OpEdNews] Reference

ECOWAS: Stakeholders react to the challenge of multiple inconvertible currencies currencies in use within ECOWAS countries and their apparent inconvertibility pose a major challenge to formal intra-regional.    From Wordnik.com.  [WN.com - Articles related to Venezuela devalues currency] Reference

A six-month debt-service reserve account, coupled with a six-month letter of credit (LOC) provided by Credit Suisse (CS, acting through its Cayman Islands branch), helps protect against a potential currency inconvertibility / non-transfer event.    From Wordnik.com.  [The Earth Times Online Newspaper] Reference

A conservative fiscal policy since 1991, including inconvertibility of the national currency, the som, has shielded its citizens from the hyperinflation that ravaged other former Soviet republics, but the policy previously diminished potential foreign investment.    From Wordnik.com.  [AGORAVOX - The Citizen Media] Reference

They’re an intrinsic result of unpredicted change, together with the inconvertibility of capital.    From Wordnik.com.  [The Volokh Conspiracy » Repeating the Mistakes of the Mortgage Crisis] Reference