I fix the problem after doing `cupstestppd` on `/usr/share/ppd/HP/hp-deskjet_3700_series.ppd.gz` and received:
```
hp-deskjet_3700_series.ppd: ÉCHEC
**FAIL** Unable to open PPD file - Mot-clé d’option interdit on line 61. REF: Page 19, section 3.3.
```
("option keyword forbidden")
After removing every line including "Custom/Custom1" keyword (lines 61, 100, 137 and 173) in hp-deskjet_3700_series.ppd, `cupstestppd` return :
```
hp-deskjet_3700_series.ppd: PASS
WARN Size "Photo2L" should be the Adobe standard name "5x7".
WARN Size "LSIZ" should be the Adobe standard name "3.5x5".
WARN Size "Card3x5" should be the Adobe standard name "3x5".
WARN Size "Photo4x5" should be the Adobe standard name "4x5".
WARN Size "Card4x6" should be the Adobe standard name "4x6".
WARN Size "Card10x15" should be the Adobe standard name "4x6".
WARN Size "Card5x7" should be the Adobe standard name "5x7".
WARN Size "FLSA" should be the Adobe standard name "FanFoldGermanLegal".
WARN Size "Letter" should be the Adobe standard name "8x10".
WARN Size "Oufuku" should be the Adobe standard name "DoublePostcard".
WARN Size "Env" should be the Adobe standard name "EnvPersonal".
WARN Size "A5" should be the Adobe standard name "Letter".
WARN Size "B5176x250" should be the Adobe standard name "ISOB5".
WARN Size "PostCard" should be the Adobe standard name "Postcard".
WARN Size "3x5in" should be the Adobe standard name "3x5".
WARN Size "Card4x6in" should be the Adobe standard name "4x6".
WARN Size "Card5x8in" should be the Adobe standard name "5x8".
WARN Size "A48.27x11.69" should be the Adobe standard name "A4".
WARN Size "USLETTER" should be the Adobe standard name "Letter".
WARN Size "LETTER8.5X11" should be the Adobe standard name "Legal".
WARN PCFileName longer than 8.3 in violation of PPD spec. REF: Pages 61-62, section 5.3.
```
HP Device Manager still return the same error when trying to install the printer (cached ppd?) but it's working via any CUPS UI (manjaro-printer for me) and after successfully print the test page, the printer appear on HP DeviceManager as well.
I fix the problem after doing `cupstestppd` on `/usr/share/ ppd/HP/ hp-deskjet_ 3700_series. ppd.gz` and received:
``` 3700_series. ppd: ÉCHEC
REF: Page 19, section 3.3.
hp-deskjet_
**FAIL** Unable to open PPD file - Mot-clé d’option interdit on line 61.
```
("option keyword forbidden")
After removing every line including "Custom/Custom1" keyword (lines 61, 100, 137 and 173) in hp-deskjet_ 3700_series. ppd, `cupstestppd` return :
``` 3700_series. ppd: PASS egal".
REF: Pages 61-62, section 5.3.
hp-deskjet_
WARN Size "Photo2L" should be the Adobe standard name "5x7".
WARN Size "LSIZ" should be the Adobe standard name "3.5x5".
WARN Size "Card3x5" should be the Adobe standard name "3x5".
WARN Size "Photo4x5" should be the Adobe standard name "4x5".
WARN Size "Card4x6" should be the Adobe standard name "4x6".
WARN Size "Card10x15" should be the Adobe standard name "4x6".
WARN Size "Card5x7" should be the Adobe standard name "5x7".
WARN Size "FLSA" should be the Adobe standard name "FanFoldGermanL
WARN Size "Letter" should be the Adobe standard name "8x10".
WARN Size "Oufuku" should be the Adobe standard name "DoublePostcard".
WARN Size "Env" should be the Adobe standard name "EnvPersonal".
WARN Size "A5" should be the Adobe standard name "Letter".
WARN Size "B5176x250" should be the Adobe standard name "ISOB5".
WARN Size "PostCard" should be the Adobe standard name "Postcard".
WARN Size "3x5in" should be the Adobe standard name "3x5".
WARN Size "Card4x6in" should be the Adobe standard name "4x6".
WARN Size "Card5x8in" should be the Adobe standard name "5x8".
WARN Size "A48.27x11.69" should be the Adobe standard name "A4".
WARN Size "USLETTER" should be the Adobe standard name "Letter".
WARN Size "LETTER8.5X11" should be the Adobe standard name "Legal".
WARN PCFileName longer than 8.3 in violation of PPD spec.
```
HP Device Manager still return the same error when trying to install the printer (cached ppd?) but it's working via any CUPS UI (manjaro-printer for me) and after successfully print the test page, the printer appear on HP DeviceManager as well.