Netbeans 7.2 shows "Unable to resolve identifier" , although build is successful

Question

I'm using the Netbeans IDE 7.2 with C/C++ plugin (last version 1.18.1.1) and if I build my project everything is fine but the IDE show me errors (e.g. unable to resolve identifier ...)

Anyone else have this bug and how can I solve it?

Minutes

Where do you get the idea that 'everything is fine' if you get linker errors? Nitpicking aside, those errors almost certainly result from you not including the relevant libraries into the build process. – Photoreconnaissance

The build was successful (build log), only the IDE show me errors. – Minutes

Can you post the build log and maybe a screenshot of the errors ? – Scottie

This question lacks important details. Are you asking for a general solution for when "There are errors, but everything is fine"? – Canzona

Answer 1

Here's an excerpt from my answer to another question.

Unresolved Identifier

If the source of the .cpp file looks like this

Click with the right mouse button on your project.
Check C/C++ Code As...
Run Reparse Project.

If that is not enough.
Go to Project Properties
Fill in the Include input field as described.

Set the include path correct.

I hope that can help you.

Sinhalese

What did you use to highlight the menu items in the screenshots? – Sandfly

@h3nr1x : What do you mean? – Sinhalese

What software did you use to draw the green border rounded rectangle around the highlighted items in the image above? – Sandfly

@h3nr1x : Ulead Photoimpact 8 to 12 . It's now Corel . – Sinhalese

Reparse project does not show up in netbean 12. Any idea? – Aholah

@Aholah : sorry at the moment I don't use Netbeans 12. Maybe Next Year :-) – Sinhalese

Thanks @moskito-x. I got the solution. Right click on "Project". Select "Code Assistance". Clean C/C++ cache. Restart IDE. – Aholah

Welcome. Pl see my ans below. – Aholah

Answer 2

i had the same problem, but i recognized it appears after i changed properties-> c++ compiler -> Compilation Line -> additional options to -std=c++11. if change the settings to default the error "unable to resolve identifier" disapears.

Maryland

For me the setting was under the drop-down list labelled C++ Standard, I assume that's effectively the same as manually adding it to additional options. My non-netbeans Makefiles have -std=gnu++0x, so that would probably work too, but it would have to go in the additional options, since it's not in the drop-down list. – Dorcas

I had the same problem on my Netbeans 8.2. The first time this problem disappeared after changing the "C++ Standard" option to "C++11". When I've ran Netbeans another day, I saw this issue again. Then I've changed "C++ Standard" to <Default> and the problem disappeared (again). – Telecommunication

Answer 3

TL;DR

UTF-8 WITH BOM can cause problems too.

PROBLEM

I just had the same problem, and I tried lots of possible solutions, but none of them worked, until I found out the source of the problem, which was a bit funny. I know this question has already been answered, but I write down my solution, maybe it will solve the problem of someone else suffering from the same problem.

For example, I got "Unable to resolve identifier Vector" when defining struct Vector, while it was correct:

I got many errors similar to this when declaring/defining functions, etc. Additionally, my code assistance didn't work because of the amount of errors.

SOLUTION

1. I opened the .cpp file in Notepad++, and saw the file was encoded in regular UTF-8, which means that the file begins with the byte order mark (BOM) character:

2. So I clicked Encoding → Convert to UTF-8 without BOM:

   Note: do NOT just switch to "Encode in UTF-8 without BOM", because it can mess up some special characters (e.g. characters containing accents, etc.). So convert it.

3. Save

4. Problem gone: no errors reported in NetBeans anymore:

   I hope it saves some time for someone else too.

Waldo

All this is great, thanks !! can I change the encoding without having to follow this process for each file? i.e. can I change the encoding directly in NetBeans? – Pardoes

@mm_: You're welcome! Maybe you could try this: https://mcmap.net/q/211245/-how-to-change-file-encoding-in-netbeans. Haven't tested it though, but I'm curious whether it works correctly for a file which has the encoding UTF-8 with BOM (or any other encoding except UTF-8 without BOM). – Waldo

Answer 4

I recently had this error with netbeans 8.0.2 on OS X, and couldn't find an answer for what to do.

I solved the problem by uninstalling the C/C++ plug-in, when I reopened netbeans it prompted me to 'fix code assistance..'.

Clicking the prompt and letting it run the problem was fixed.

Tola

Answer 5

I am using NetBeans 8.1 and the same problem popped up when I started a new C++ project. It solved itself after running the project through the debugger.

Anyaanyah

Answer 6

We develop our code on one computer and compile on another. I was getting these distracting markups until I "set Build Host" to the remote machine (in the right-click menu for the project).

I'm still not sure what the problem on the development computer was, since the unresolved identifiers were things from the standard library (size_t, std::vector etc) and the answers here didn't seem to help.

Dorcas

Answer 7

I often have this error, and as others mentioned, usually I add space character, save the file, remove the space character... and all identifiers are solved.

This time it did not work. My project, which I compiled thousand times, and it always worked, suddenly crashed MPLAB X IDE v3.35 (Mac OSX, but likely it doesn't matter), while typing text. After this I have in one file only and for one structure only, all identifiers unresolved.

Structure in profile.h file was:

typedef struct
{
    int state;                      ///< state machine current state
    int enabled;                    ///< machine can be ENABLED or DISABLED
    int flag;                       ///< to initiate profile execution
   ... many variables here ...
    unsigned long timestamp;        ///< variable used for local timing
} profile_struct;

In my profile.c file any variables from this structure became unresolved, but project compiled and worked fine.

After a frustrating hour of trying, this solved my problem: Erased the whole MPLABX cache directory.

In my case, it is located at:

/Users/USER_NAME/Library/Caches/mplab_ide/dev/v3.35/var

(need to erase the whole 'var' directory; and of course replace the USER_NAME with your user name)

Note, that the 'Library' is a hidden directory, but you can still access it if you enable viewing hidden files, or go straight to it via terminal.

Lastly, on your computer it might be somewhere else. I found mine by watching, which files were modified on my computer in the last 2 minutes, by using the terminal command:

/usr/bin/find /Users/USER_NAME/ -mmin -2 –ls

Traynor

Answer 8

I always have to reinstall MPLAB X when this happens. Other things work from time to time, but that always works.

Yellowknife

Answer 9

Three ways to solve the issue of "unable to resolve identifier" error in Netbeans 12.

1. Right click on "Project". Select "Code Assistance". Clean C/C++ cache. Restart IDE.
2. Right click "Project properties"---> go to build--> under C/c++ compiler, set both your C and C++ compiler to the same standard, on every C/C++ project.
3. Under tools--> options--> C/C++-->code assistance, change:__cplusplus=199711L to:__cplusplus=201402L for C++14 or to __cplusplus=201103L for C++11

I realised while resolving my own problem, the proper/aligned enclosing braces could cause the above error. Make sure your braces are balanced and aligned.

Aholah

sure. see here – Aholah

Answer 10

I had the same problem after copying a code having NULL comparison:

while (str1[i] != ’\0’) {
out[i] = str1[i];
i++;}

After searching a lot , it turned out the weird ’ quotation used is the problem , I changed it to the normal ' and everything worked normal

while (str1[i] != '\0') {
out[i] = str1[i];
i++;}

Dissatisfactory

Answer 11

Mine worked once i renamed my main.c to main.cpp.

Based on the file extension, the behavior of Netbeans Code Assistance changes

Aras

Answer 12

try Click by Right button the file, Properties->General->Exclude from code assistance (disable)

Kay