Answers.Body: <p>I think you forgot to load (or install) the <code>doParallel</code> package as the <strike>error</strike> warning message is complaining about the lack of a parallel backend. <code>library("doParallel")</code> should do the trick.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-10-10T07:51:07.740Z
Answers.Text: Thank you, I have tried this.. but still getting same error message. Packages I installed now are; edgeR, limma, doParallel, WGCNA
Answers.UserDisplayName: holly
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-10-09T21:09:17.287Z
Answers.LastActivityDate: 2019-10-10T07:18:01.950Z
Answers.LastEditDate: 2019-10-10T07:18:01.950Z
Answers.UserDisplayName: haci
Answers.Body: <p>What you see is a warning, not an error. Your calculation will run fine, just slower. Unless you see other errors, you should be able to complete all steps of the analysis.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-10-09T23:00:21.903Z
Answers.LastActivityDate: 2019-10-09T23:00:21.903Z
Answers.UserDisplayName: Peter Langfelder
Body: <p>I am using WGCNA to identify Consensus modules. I get a warning message when completing the following step:</p>
  
  <blockquote>
    <p>Call the network topology analysis function for each set in turn</p>
  </blockquote>
  
  <p>Warning:</p>
  
  <pre><code>Warning message: executing %dopar% sequentially: no parallel backend registered
  </code></pre>
  
  <p>Does anyone no what this error code means as I cannot plot the scale free analysis, with soft thresholding.</p>
  
  <p>Thank you </p>
  
  <p><code>powers = c(seq(4,10, by=1), seq(12,20, by=2))
  powerTables = vector(mode= "list", length = nSets)
  for( set in 1:nSets)
  powerTables[[set]] = list(data=pickSoftThreshold(multiExpr[[set]]$data, powerVector= powers,
  verbose =2)[[2]])</code></p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-10-09T20:53:35.160Z
Comments.Text: Please add your code giving the error and especially the packages you have loaded.
Comments.UserDisplayName: haci
Tags: <r><wgcna>
Title: R WGCNA error code
ThreadText: # R WGCNA error code
  
  (Asked by: username_0 on 2019-10-09)
  
  I am using WGCNA to identify Consensus modules. I get a warning message when completing the following step:
  
  > Call the network topology analysis function for each set in turn
  
  Warning:
  
  ```
  Warning message: executing %dopar% sequentially: no parallel backend registered
  
  ```
  
  Does anyone no what this error code means as I cannot plot the scale free analysis, with soft thresholding.
  
  Thank you
  
  `powers = c(seq(4,10, by=1), seq(12,20, by=2))
  powerTables = vector(mode= "list", length = nSets)
  for( set in 1:nSets)
  powerTables[[set]] = list(data=pickSoftThreshold(multiExpr[[set]]$data, powerVector= powers,
  verbose =2)[[2]])`
  
  **Tags:** r, wgcna
  
  > **Comments:**
  > **username_1**: Please add your code giving the error and especially the packages you have loaded.  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_1 on 2019-10-09. Score: 0 | Accepted answer
  
  I think you forgot to load (or install) the `doParallel` package as the error warning message is complaining about the lack of a parallel backend. `library("doParallel")` should do the trick.
  
  > **Comments:**
  > **username_0**: Thank you, I have tried this.. but still getting same error message. Packages I installed now are; edgeR, limma, doParallel, WGCNA  
  
  ---
  
  ### Answer by username_2 on 2019-10-09. Score: 1
  
  What you see is a warning, not an error. Your calculation will run fine, just slower. Unless you see other errors, you should be able to complete all steps of the analysis.
  
  
  ---
  
  