Because each side was convinced of the legitimacy of its own claim, the pretensions of the other party were considered usurpatory, an ill-omened beginning that burdened the relations of both countries.

The treaty did resolve an immediate concern of each side, but subsequently it became evident that in the far south, about 42°S to 52°S, Article 1 of the treaty posed problems of interpretation and application.

Some Argentine political publicists argue that Articles 2 and 3 of the treaty were ambiguous, but they have to admit the truth that the later Argentine interpretations were refused by the international tribunal, that Argentine maps of the first decade also applied the Chilean interpretation and the two papal proposals as well as the treaty of 1984 maintained the Chilean interpretation of the treaty, at least in so far as the land border line.

There could be other reasons for the Argentine difficulties over the interpretation.
Michael Morris observes about the Argentine policy:
Rearguard Argentine efforts has been made to gain recognition for some kind of shared management regime for the Strait [of Magellan], in order to mitigate what was perceived as the striking diplomatic defeat for Argentina in the 1881 treaty granting Chile control over the strait.

The Southern Patagonian Ice Field is the last still pending issue to apply the 1881 Boundary Treaty.
Because each side was convinced of the legitimacy of its own claim, the pretensions of the other party were considered usurpatory, an ill-omened beginning that burdened the relations of both countries.
The treaty did resolve an immediate concern of each side, but subsequently it became evident that in the far south, about 42°S to 52°S, Article 1 of the treaty posed problems of interpretation and application.
Some Argentine political publicists argue that Articles 2 and 3 of the treaty were ambiguous, but they have to admit the truth that the later Argentine interpretations were refused by the international tribunal, that Argentine maps of the first decade also applied the Chilean interpretation and the two papal proposals as well as the treaty of 1984 maintained the Chilean interpretation of the treaty, at least in so far as the land border line.
There could be other reasons for the Argentine difficulties over the interpretation. Michael Morris observes about the Argentine policy:
Rearguard Argentine efforts has been made to gain recognition for some kind of shared management regime for the Strait [of Magellan], in order to mitigate what was perceived as the striking diplomatic defeat for Argentina in the 1881 treaty granting Chile control over the strait.
The Southern Patagonian Ice Field is the last still pending issue to apply the 1881 Boundary Treaty.
Boundary Treaty of 1881 between Chile and Argentina