rxbag: error loading [twist.bag]: Unindexed bag [closed]

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Hi,

I use 2 nodes that write into bag files, and while 1 writes correctly to bag, the other node gives this error. The difference between the nodes is that the 1 writing correctly has only 1 class (with callback) and has all bag writing concentrated in 1 place. The one with error has 2 classes, each with callback. Both classes need to write to bag, so (as far as I know) the writing to bag can't be in 1 place. How can I solve this?

OK, I found out that rosbag seems to only work when using only 1 class with callback. As soon as I have 2 classes (with their own callback) it apparently is unable to index.