# How this error can be solve **URL:** \ **Category:** GNU Radio\ **Created:** [January 15, 2014, 9:42am UTC](https://www.ruby-forum.com/t/how-this-error-can-be-solve/238519 "2014-01-15T09:42:45Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![musicdenotation](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ea666f/32.png) [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Post date:** [January 15, 2014, 9:42am UTC](https://www.ruby-forum.com/t/how-this-error-can-be-solve/238519/1 "2014-01-15T09:42:45Z")
hello every buddy, ``` i face such aerror so many time but not able to sovle ``` ## can you suggest how to solve , i attach a snap shopt please see and suggest me _Thanks and regard:_ _MR.Maheshkumar P._ _call @ 9662784649_ ---
**Author:** ![Maheshkumar\_P](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/f475e1/32.png) [@Maheshkumar\_P](https://www.ruby-forum.com/u/Maheshkumar_P)\ **Post date:** [January 15, 2014, 9:42am UTC](https://www.ruby-forum.com/t/how-this-error-can-be-solve/238519/2 "2014-01-15T09:42:47Z")
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi Maheshkumar, the output of ‘Complex to Mag^2’ is a vector of length ‘2’. That doesn’t fit to the input signature of the following block ‘Threshold’. Put a ‘Vector to Stream’ block in between just like the ‘Stream to Vector’ block before the ‘FFT’. Just the reverse operation. For completeness of this mail. IO size ‘8’ refers to the number of bytes in a vector. A float consists of 4 bytes and thus a vector with 2 samples/floats has a size of 8 bytes. The IO signature for ‘Threshold’ is a stream (or vector of size one). Thus only one sample/float with a size of 4 bytes. Happy hacking Johannes On 14.01.2014 23:00, Maheshkumar P. wrote: > hello every buddy, > > i face such aerror so many time but not able to sovle can you > suggest how to solve , i attach a snap shopt please see and suggest > me – _Thanks and regard:_ \* \* \* MR.Maheshkumar P. \*\* \* \*call @ > 9662784649 \* > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.12 (GNU/Linux) > Comment: Using GnuPG with Thunderbird - [http://www.enigmail.net/](http://www.enigmail.net/) iQIcBAEBAgAGBQJS1jeXAAoJEO7fmkDsqywMCT8P/0dt127j1LxRNNariya0r6Kc F6mlq+Dtgk5njBpjdHnABmIWwkEmBbs+Z7Mg2Som5ZBL1Uzolb+LSL8vAm/j/6is /ymKhDaDF5MROOA2HPONywWHiQlg00PGB0RN9JMXXT87UuUH5dGIgfJub5J0NiOz m9myVVUnpXVYm7zEGrjnOVxLRAKhyy9jdeXcPwHbZ1q4H51Rz0AFEenqZ58HxznQ LaInHsepXKnqeSlDCGw5DqUenS6b6bt2afR2Nod/ix2EnJteVr0BdM9fKuXX7yqp 6Xi9R1xQoBDIzpjtLE50QnEa6nf1bAGrW86OIb5b2H+yM2YN9qZ4sVYUlLZFHX2q 4ppCS0cwuXP9noJF8JO686L+mbPQ1mOfefiQzSkgLJz6u/31yoRMeaKIXEB3E4Kv o0emZl1Iuy/NRcSDUTbMsafDzN3Co/W52RRbb4i0C52w2tfLEx3nQUVhiYkR/UNQ DTY+hPjXeh+mUfHQMFdDKjy5jYkXWIWsSKM3pq3pTQeC4whqlVqtR5narEgdfMvu FJ4lTMn4F6SNhLz+Ab6JBEBueaQ1cmP+3XwRiAboWC0opbpZ9inN19USnMomVsa9 aguDyVscvIsyHTdaoXOSRODzFtcaMc5ZZifLTPUYgCEEWx7ziLcX4qQReUH/QloQ XEe6UD75PlUKysWLYFkK =5uwG -----END PGP SIGNATURE----- ---
**Author:** ![Maheshkumar\_P](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/f475e1/32.png) [@Maheshkumar\_P](https://www.ruby-forum.com/u/Maheshkumar_P)\ **Post date:** [January 15, 2014, 11:10am UTC](https://www.ruby-forum.com/t/how-this-error-can-be-solve/238519/3 "2014-01-15T11:10:19Z")
On Tue, Jan 14, 2014 at 11:24:07PM -0800, Johannes D. wrote: > Hi Maheshkumar, > > the output of ‘Complex to Mag^2’ is a vector of length ‘2’. That > doesn’t fit to the input signature of the following block ‘Threshold’. GRC actually highlights these problems for you. In your screenshot, there’s a red arrow at the offending port. Check for these things marked in red to give you a clue where the problem might be. MB