Spain's Public Procurement Portal Blocked by Obsolete Java Web Start

Spanish e-procurement stalls due to a .jnlp file

A tiny file can exclude companies from public tenders. LicitacionelectronicaPLACSP.jnlp is the launcher used by the Spanish State Contracting Portal to open its electronic bidding application. Double-clicking often yields nothing or an opaque error with a "more information" link. This marks the start of a painful process.

The issue lies not in the file itself. Web Start, the Java system executing these launchers, was discontinued after Java 11. On modern systems, the .jnlp file is useless. The second part of the problem is that public procurement procedures still depend on it.

What is a .jnlp file and why it no longer opens

A .jnlp file is not the program but the address where the program resides. Upon opening, the device had to download, verify, and execute the portal application. This mechanism, Java Web Start, was integrated until Java 8 before being removed from the standard package. The result is a technical gap hard to justify: systems that did not migrate still require a component no longer distributed.

Thus, there is an apparent workaround: installing an older Java version or using a computer with Windows 7, where the launcher still works. This is not a solution, but a circumstantial patch.

The circulating fix: javaws.exe and "open with"

The most common method involves the executable javaws.exe, the Java web application launcher. Running it manually, instead of relying on system file associations, often resolves the initial click. The quickest variant is right-clicking the .jnlp file, selecting open with, and choosing "Java(TM) Web Launcher" from the list.

It seems trivial. It is not: when the system lacks this association, Windows offers anything but the correct launcher. Official documentation exists —the portal refers to its own point 1.4— and a widely cited external guide titled "how I survived installing a Java application on Linux," which summarizes the entire journey. That the most reliable recipe is a personal tutorial says much about the current state.

What the blockage reveals: Java 8 still supports administration

This episode connects with deeper criticism. A forum user ironically noted that public websites are "already" on Java 8, presenting that version, with its lambdas and streams, as if it were the future.

Opening the file is only half the procedure

The complete sequence is almost a parable. After several failed attempts, the file peine thanks to a PDF explanation sent by another person, and the submission was completed "as best I could understand." Then came the warning: some things needed redoing. Resuming work, the new file —LicitacionelectronicaPLACSP(1).jnlp— returned exactly the same error. Pogre, in .jnlp format, consists of starting over.

The technical sarracena is simple: while the administration does not retire Web Start, bidding via this portal will continue to require old Java and patience. The policy aspect is more uncomfortable: a mandatory procedure should not depend on someone emailing you a PDF with the recipe.