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Editorial Team
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Asked: 2026-05-14T03:54:11+00:00

I’m trying do build and debug a small project for BlackBerry. During the build

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I’m trying do build and debug a small project for BlackBerry.

During the build I’m getting this error Error preverifying class java …

I read on the net this error could be caused by referencing multiple projects but I tried to move every package in a single project but the error is still there.

I tried with multiple JDE version (currently 4.7) and the Java compiler is set to 1.6. Eclipse version is 3.4.1 as recommended by RIM’s documentations.

Edit for clarification

To clarify: I’m not referencing exterlan JARs, only “my” Classes.

The Error preverifying class is thrown on a very simple class (4 private field with getters/setters, implementing serializable, that’s all!). What’s weird is that I got the error only on this class. I have others classes like this, but these are ok.

I changed the compliance level to 1.4 but the error persists…

Does someone have some clue?

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1 Answer

  1. Editorial Team

    I got what’s wrong!

    First of all, I was trying to port an Android project to BlackBerry, and since you program both device in Java I thought: ok, just go ahead and implement the device specific classes… But that’s not completely true!
    So to make it compile I included in the BlackBerry project the JRE System Library, thinking it was just “right”. But…

    BlackBerry does not use Java SE as Android does. They implemented their own libraries.* (as pointed out here Blackberry JDE ArrayList?)

    So the error “Error preverifying class java” was actually caused by a external JAR, and this JAR was the JRE System library…

    To fix this, I removed JRE and replaced all the standard classes (like ArrayLists etc) with RIM’s implementation 🙁

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