求助buffer size

[ilavu]

求助:做了个示波器的程序,今天去实验室测试总是出错,以为是写的程序出错,于是又弄了一个最简单的,就是一个graph,一个daq,用的usb6009,但是运行的时候也会出错,错误是:

Attempted to read samples that are no longer available. The requested sample was previously available, but has since been overwritten.

Increasing the buffer size, reading the data more frequently, or specifying a fixed number of samples to read instead of reading all available samples might correct the problem.

Property: RelativeTo
Corresponding Value: Current Read Position

Property: Offset
Corresponding Value: 0

我用的是7.1版本,同学用7.0做完全一样的程序却没有问题.这是为什么啊?

[Rui Liang]

is error code: - 200279 ?

Possible cause: The application did not retrieve the data from the buffer fast enough, so the data was overwritten.
Solutions: Increasing the buffer size or reading the data more frequently may correct the problem.

or call NI 8008203622-144