What does "in his life or in his present errand" mean?

Question

In the novel The Crystal Man, in Chapter I, there is this sentence:

He was not entirely at peace with society: there was something in his life or in his present errand which he desired to conceal.

Please can anyone explain what "present errand" means? And how can I rewrite this sentence using other words, but with the same meaning?

Answer 1

Present errand here simply means current task.