# GR Block Input Item Size **URL:** \ **Category:** GNU Radio\ **Created:** [October 25, 2010, 9:52pm UTC](https://www.ruby-forum.com/t/gr-block-input-item-size/198064 "2010-10-25T21:52:22Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Dobai-Pataky\_BSSSSl](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/77aa72/32.png) [@Dobai-Pataky\_BSSSSl](https://www.ruby-forum.com/u/Dobai-Pataky_BSSSSl)\ **Post date:** [October 25, 2010, 9:52pm UTC](https://www.ruby-forum.com/t/gr-block-input-item-size/198064/1 "2010-10-25T21:52:22Z")
Hi, I want to create a block that requires 10000 input items and produces 10000 output items on a single stream. However, I’m getting the following message: sched: \ is requesting more input data than we can provide. ninput\_items\_required = 10000 max\_possible\_items\_available = 8191 If this is a filter, consider reducing the number of taps. How do I get the block to operate as I want? I thought inheriting from gr\_sync\_block with 1:1 input/output rate would work, but it doesn’t seems to be the case. Andrew ---
**Author:** ![dukael](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/c77e96/32.png) [@dukael](https://www.ruby-forum.com/u/dukael)\ **Post date:** [October 26, 2010, 2:10am UTC](https://www.ruby-forum.com/t/gr-block-input-item-size/198064/2 "2010-10-26T02:10:21Z")
On Mon, Oct 25, 2010 at 12:36:13PM -0700, Andrew F. wrote: > How do I get the block to operate as I want? I thought inheriting > from gr\_sync\_block with 1:1 input/output rate would work, but it > doesn’t seems to be the case. > > Andrew If you require 10,000 input items at a time, you must call set\_output\_multiple(10000) in your constructor. Eric