In a direct communication, the source explained:

Regarding your question, would like to inform you that IMACO has not been updated since 2015 because it has been discontinued. The reason for this is the redesign of the Monthly Manufacturing Survey produced by the National Statistics Office of Colombia (DANE) in 2015, which affected the variables that were used in calculating productivity per hour worked in industry. This variable was part of IMACO, and up to date we have not been able to get an official chain-linking between the two series from DANE.

As a consequence, there is not any replacement data set available. Nonetheless, we invite you to consult a monthly index of economic activity constructed by DANE in the following website: link

In response, we have marked the series metadata and the catalog page as "discontinued".

The monthly series runs from 1992m6 to 2015m5.

It resides in the historical catalog (Colombia » Cyclical Indicators » Economic activity index).